I chose the 2.5 because I had a 2.3 in there originally and the 2.5 is essentially the same block just with different pistons/head. It was a direct swap for me, so it was a no-brainer. Swapping from a 3.0 might be more complicated because it's not the same engine configuration--for example I reused my original cylinder head because the bottom ends were essentially the same. You wouldn't be able to do that, you'd need to source the entire engine/components. You'd also need a matching ecu, harness, etc, whereas I just reused my stock ecu. So swapping a 3.0 to a 2.5 might not be the best idea. I'm sure it can be done, but you're just going to run into a lot more complications than I had. It might be better selling your truck and buying one with the 2.3 in it, then swapping that when the 2.3 dies. Or buying a donor truck and swapping everything over. Whatever you decide, good luck!
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I’m interested in swapping a 3.0 to a 2.3 or 2.5. I’m curious to know why you chose 2.5. I’m going into this build blind and can use the help!
I chose the 2.5 because I had a 2.3 in there originally and the 2.5 is essentially the same block just with different pistons/head. It was a direct swap for me, so it was a no-brainer. Swapping from a 3.0 might be more complicated because it's not the same engine configuration--for example I reused my original cylinder head because the bottom ends were essentially the same. You wouldn't be able to do that, you'd need to source the entire engine/components. You'd also need a matching ecu, harness, etc, whereas I just reused my stock ecu. So swapping a 3.0 to a 2.5 might not be the best idea. I'm sure it can be done, but you're just going to run into a lot more complications than I had. It might be better selling your truck and buying one with the 2.3 in it, then swapping that when the 2.3 dies. Or buying a donor truck and swapping everything over. Whatever you decide, good luck!