i am a 66-year-old retired professional transmission rebuilder and X shop owner, and also a mechanic. there is a few of us olskool people left around. i love the 68 R/T you painted, beautiful!
engine timing, low compression, and mild factors cam shaft are why hp is so down. not the intake. best hp gains will come from a cam and timing. next would be pistons or lower cc combustion chambers to counter the pistons stopping so low in the cylinders. a four barrel might give you 10 to 15hp. your intake eliminates the egr and your fuel milage won't go up. if your lucky and drive easy it will not go down much. fyi. this is basically a detuned Cleveland for tourqe. this and the 400 were only 170s for hp but tourqe was well north of 300 ftlbs. most common upgrades are an rv camshaft, intake, and more aggressive timing. this will give you the most bang for the buck. in the right hands these are verry good engines.
Great info Nathan. I completely agree with you. I did a straight up timing chain to go with the carb ,intake and headers. Every little bit helped the old girl.. The truck runs great. It's a nice driver. Definitely under powered to today's standards. But it has that great classic sound.
The only 4 bbl. intake that I ever used on this engine was the Offenhauser dual port 360 that was perfect. Also used the Holley model 3310 manual choke carb. Otherwise everything cast iron was mach ported & polished inside & out including heads and used the Holley 500 2bbl man. choke carb. Plus with the right gears, a real blaster in performance. Were restricted to use 2 bbls. in the sportsman class dirt track racing. All of those engine set ups were used with 4 speed manual trans.
Any chance you have a link or remember the thread size for the freeze plugs you used. I'll be installing the same intake manifold in the next week or two and would like to source them prior to the teardown.
I used a 3/4 freeze plug from Advance Auto. I had to grind it down fit the whole properly. It was all I could find. it was a dorman freeze plug. A half inch plug would have been perfect but nobody makes one .
can I get a shopping list? This is my go to video for talking myself into a 351m. Did you put Cleveland heads on? I Heard they offer better compression.
The 351M heads are basically the same two barrel heads that came on two barrel equipped 351Cs from. 70-74. The Cleveland four barrel heads had bigger valves and poets and are probably what you’re referring to. The two barrel heads also had huge valves.
I don't think it's the number of groves that breaks the tips of the valve . Its a matter of side load that will break the tip. The less groves the valve has the less the valve will spin .
@@RustedNBusted Ive dropped two of these in two different engines. the head (large end in the chambure) pops off and wedges in the piston, splitting the block. the groove count is a sign of its age. Wishing you good luck,
@JohnnysRustedNBusted they have parts. I rebuilt a 400m and used their pistons. Just a parts supplier to keep in mind. I don't do body work but I do engines.
True that! But try to tell that to a customer who wants a factory restored truck. Sometimes a low mileage truck with a numbers matching engine means more than horsepower.
i built a 400 ford worst engine i ever built heavy lots of friction and weight robbing hp and torque cost more to build too bad on gas wasn't good low rpm or high rpm hard on starters and solenoids battery cables but i liked it
Yeah the 351m wasn't the most popular engine that's for sure. I definitely wouldn't invest any more than an intake and carburetor. I'll post a video of a 460 I rebuilt in a couple days. Thanks for watching my friend !
But the truck didn't have a 460 in it. Only the 2 wheel drive ones had that option. This truck is a numbers matching low mileage 3514x4.. I like to restore them to their original character with slight modifications. Thanks for watching!
They'll make power. in stock form there a neutered Cleveland . 351m get such a bad rap. They don't deserve all the hate. Ford's most hated engine at least one of them. Good engine worth a build 😊
Plug early Cleveland 2v heads on it instead n mill them a bit will gain a little compression there plus they flow better ! Those D5 heads have built in smog and water jackets chokes them down !
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i am a 66-year-old retired professional transmission rebuilder and X shop owner, and also a mechanic. there is a few of us olskool people left around. i love the 68 R/T you painted, beautiful!
Thanks. It was a fun project. They don't make them like they used to that's for sure !
This was so helpful man, thanks heaps! Watchn and fixing my 400m from NewZealand. And havn a beer or 2👍
Glad I could help !
engine timing, low compression, and mild factors cam shaft are why hp is so down. not the intake. best hp gains will come from a cam and timing. next would be pistons or lower cc combustion chambers to counter the pistons stopping so low in the cylinders. a four barrel might give you 10 to 15hp. your intake eliminates the egr and your fuel milage won't go up. if your lucky and drive easy it will not go down much. fyi. this is basically a detuned Cleveland for tourqe. this and the 400 were only 170s for hp but tourqe was well north of 300 ftlbs. most common upgrades are an rv camshaft, intake, and more aggressive timing. this will give you the most bang for the buck. in the right hands these are verry good engines.
Great info Nathan. I completely agree with you. I did a straight up timing chain to go with the carb ,intake and headers. Every little bit helped the old girl.. The truck runs great. It's a nice driver. Definitely under powered to today's standards. But it has that great classic sound.
Good work man wow,,awesome clean work.i love that truck.🍻 🍻
Thanks Jose . I can't wait to get going on the body work!
The only 4 bbl. intake that I ever used on this engine was the Offenhauser dual port 360 that was perfect. Also used the Holley model 3310 manual choke carb. Otherwise everything cast iron was mach ported & polished inside & out including heads and used the Holley 500 2bbl man. choke carb. Plus with the right gears, a real blaster in performance. Were restricted to use 2 bbls. in the sportsman class dirt track racing. All of those engine set ups were used with 4 speed manual trans.
Thanks for the great info! So far this intake is working well. In the future I would like to change the crank and make it a stroker.
Any chance you have a link or remember the thread size for the freeze plugs you used. I'll be installing the same intake manifold in the next week or two and would like to source them prior to the teardown.
I used a 3/4 freeze plug from Advance Auto. I had to grind it down fit the whole properly. It was all I could find. it was a dorman freeze plug. A half inch plug would have been perfect but nobody makes one .
Thank you
@JohnnysRustedNBusted is it only 2?
What can i clean my gas tank out with
Vinegar works pretty good. Get the real strong stuff at home Depot. Dilute it with water and leave it in the tank for a couple weeks.
That sounds so seweet! Thanks for sharing ! (= got a 396 or a 427 hp hanging back there?? (=
Hell yeah.I have a 396 and a 460. I might put the 460 in the truck one day.
can I get a shopping list? This is my go to video for talking myself into a 351m. Did you put Cleveland heads on? I Heard they offer better compression.
I used fel pro gaskets and seals. All parts are available at Auto Zone
@@RustedNBustedintake and carb I mean! I love this video btw.
The 351M heads are basically the same two barrel heads that came on two barrel equipped 351Cs from. 70-74. The Cleveland four barrel heads had bigger valves and poets and are probably what you’re referring to. The two barrel heads also had huge valves.
NIce I have Subscribed !
Thank you ! Enjoy the videos my friend !
Did you use a valley pan gasket ?
No Valley Pan gasket was Necessary
i have 77 105,000. should i jump from refresh good running enging or open up stock heads valve work cam pistons rods bumpcomp, to 9,5 ormore
Go all out. Might as well while you're in there.
Did you feel like it gained power?
@@Gillettesgarage It gained a little power . It runs smooth through the rpm range now . Definitely worth the small investment
Hey did you use the valley pan gasket for that 4 barrel intake?
No valley pan gasket required
I'd swap those multi groove valves asap. They are know for dropping, and taking out engines.
I don't think it's the number of groves that breaks the tips of the valve . Its a matter of side load that will break the tip. The less groves the valve has the less the valve will spin .
@@RustedNBusted Ive dropped two of these in two different engines. the head (large end in the chambure) pops off and wedges in the piston, splitting the block. the groove count is a sign of its age. Wishing you good luck,
Interesting. Well hopefully that doesn't happen to mine. It's been running strong. I appreciate your comment @@beecj0
Oh COBRA,DOPE
Hell yeah! You're the first person to get it. LOL
Tmeyer can help.
Not sure what you mean?
@JohnnysRustedNBusted they have parts. I rebuilt a 400m and used their pistons. Just a parts supplier to keep in mind. I don't do body work but I do engines.
A im here,the,good ,bad,ugly, funny stuff
You're the first person to get it... Cobra.. 80s movie's rule !
Just look at those open chamber NO POWER HEADS!!! You can dump a fortune into a 351M boat anchor and it still will not perform like a 390 or a 440.
True that! But try to tell that to a customer who wants a factory restored truck. Sometimes a low mileage truck with a numbers matching engine means more than horsepower.
i built a 400 ford worst engine i ever built heavy lots of friction and weight robbing hp and torque cost more to build too bad on gas wasn't good low rpm or high rpm hard on starters and solenoids battery cables but i liked it
Yeah the 351m wasn't the most popular engine that's for sure. I definitely wouldn't invest any more than an intake and carburetor. I'll post a video of a 460 I rebuilt in a couple days. Thanks for watching my friend !
They have oil pressure problems they always have no horsepower Big iron hunk of piece of s*** gas hog
In the 80's, M standed for morphidite.
Hahaha. Gotta love the 80s. To bad Weiand didn't make an intake for it back then. Maybe the old 351m wouldn't have gotten such a bad rep.
All this when you could have done a re-ring on a 460 and have nearly double the horsepower and torque.
But the truck didn't have a 460 in it. Only the 2 wheel drive ones had that option. This truck is a numbers matching low mileage 3514x4.. I like to restore them to their original character with slight modifications. Thanks for watching!
They'll make power. in stock form there a neutered Cleveland . 351m get such a bad rap. They don't deserve all the hate. Ford's most hated engine at least one of them. Good engine worth a build
😊
I have my dad’s old 78 F-250 super cab. 351M. Like that its a non catalyst engine
Plug early Cleveland 2v heads on it instead n mill them a bit will gain a little compression there plus they flow better ! Those D5 heads have built in smog and water jackets chokes them down !
How much horsepower do you think that will add?
@ about 20or30 little more with cam and stainless valves witch i have in mine. Big difference over the D5 heads !