I'm curious what the differences are, besides the obvious displacement, in the 331 and the 347 strokers. What are the pros and cons of each? I overheard someone mention that 347's use oil quite a bit...any truth?
Well, Craig....I'm picking up a used 5.0 rollerblock this weekend. I would like to put aluminum heads on and will keep the aluminum intake and Holley carb I currently have. I have just heard quite a few guys here talk about the 347 stroker kits and was curious at the differences.
When I did my 331 I did so because of the rod ratio. The 331's ratio is more conducive with longevity. If you want to race and rebuild go 347.
This actually answers my question. Longevity and maintenance is important and it looks like a 331 is better than stock and maybe not a good as a 347 in some areas but better for longer life of the engine.
I can't speak from personal experience, meaning I haven't built both and directly compared them, but from what I have read from some of the most knowledgeable Ford builders out there, the ONLY reasons to build a 331 vs. a 347 is if you are restricted by some class rules for the racing you are doing, or if for whatever reason you just want less power. That is it.