67 Mustang floor pan installation

In this video, I am prepping the floor pan, dry-fitting it, marking it for weld locations, and welding it in place. I am using an engine hoist to help support the floor while prepping it, to keep the pan from sagging too much.

[@cyclonescott]

When I did my 67 mustangs floor I also added the convertible inner rockers. I went with the 69-70 one piece seat riser and just modified the ends too meat up with the rockers. I also added a set of Spintech subframe connectors. They are a great way to add even more chassis strength and tuck up nice to the floor pan.

[@67mustangcouperestoration]

I like the Spintech subframe connector design. I would think sealing all the gaps between the welded flanges would be a good idea, because I didn’t see any drain holes in the bottom surfaces, so it could potentially be bad if moisture got inside with no way out.
I haven’t decided yet which way I’ll go with them yet though. I am contemplating making my own set, but I have to wait till I get a bit further along to make that decision. I may opt to incorporate additional tabs to tie the connectors in to the bottom of the floor pan as well, like Spintech, but with fully boxed tubing. It’s just a thought right now, so we’ll see when I get closer to that point.

[@cyclonescott]

@@67mustangcouperestoration the back end of the subframe connectors are open so moisture can run out. I coated the insides well before attaching them. My car will mostly be a fair weather car so I'm not that concerned with them getting that wet inside.

[@cutworm59]

Music is a little bit loud. Great job 👏

[@davidmancuso2334]

I'm doing a 65 with that style of a one piece floor. Right now the front floor supports aren't in so I was planning on bringing mine in from the bottom. I see you have convertible inner rockers which is going to add strength to the structure. That's a good idea.. Good luck with it. Looking good.

[@67mustangcouperestoration]

Thanks. Moving the floor pan around can be pretty awkward for sure, but putting it in from the bottom will probably be fairly drama-free. Good luck!

[@67Stang]

I understand that Ford had a 1/8 inch acceptable tolerance when building these cars. That might explain some of the overall gaps to some extent.

[@67mustangcouperestoration]

I think the factory stamped panels were pretty accurate, but they were then assembled pretty much by hand, so that’s probably where the gaps come along.

[@67Stang]

@@67mustangcouperestoration Very true. I have also seen it said the quality often depended on the day of assembly with Fridays being the worst.

[@b67fstb]

question : isn't there a difference between full floor for a convertible and a fastback/coupe ??

[@67mustangcouperestoration]

Yes. The convertible floor is not as wide, because the inner convertible rockers make the floor a few inches narrower.