[WheelsUp]

Originally posted by ultraflo
I've learned not to argue with anyone on a message forum, it's all a matter of opinion and preference (some experience helps too)...

I stated 347 for the reasons that have already been addressed (CHP)... however, I've had a bare R302 block that I've been wanting to turn into a 331 high-winder since '99 ($$$). I know about rod-stroke ratios... I run a long rod 306 (5.400" rods, 1.8:1)

All you can do is present your case and support it with facts... without getting ugly ...and let the person decide for themselves, I never woulda thought the 331 would have become the fad the 347 used to be a few years ago. I thought I was really on to something when I planned for the 331, now everyone wants to run one. I personally prefer the 331, but won't argue with the guy who says the 347 is better...

There is, in fact... no replacement for displacement! ...other than power adders

Very well put Ultraflo,
usually I try to stay away from post like this 331 vs 347,TFS TW vs AFR185 because I know where they end up going,right into a pissing contest about what I seen where,and who built it.

I think I have a happy medium here,if you want a302 based block race motor go for a 347,the extra throw of the longer rods will help to get it out of the hole,331 for reliability and a few extra revs on the top end of the track,now before someone says well a 331 can do that yes it can no doubt.

Personally speaking,I think if you get it put together properly,there is nothing to worry about with either,when you get off into junk parts and shade tree mechanics is when you run into problems. Ronnie Crawford is the father of the 347(at least he made it fashionable back in 92) and there are guys still out there with his 347's and 100k miles so it is all a crap shoot anyway.