For starters...This got me wound up for someone posting a 351w is a waste of money. It's just not so....
Ok, let's clear this up... Yes, the 347 is lighter. I agree. Would it trap faster than an equal 351w due to weight? Yes, I'll agree with that, also. You're all right, don't deny it! ........
But, torque, I don't agree that the 347 would take the 351 on because of MASS. Post a dyno sheet and disprove it....you won't find one.
I've read countless articles on how on dynos an FE 427 will tromp all over a 427 windsor torquewise because of the big block's MASS.
Will a lighter engine trap faster? mmyeah. More throttle response?? Yes. More fun to drive??? ....Opinion.....maybe no. Torque is fun on the street.
ANYWAY....My point wasn't apples to apples.... I'd stroke the windsor....with out teeny 170 heads.....and make more power!!!!
408 beats 347!!!
Sorry I wasn't more clear on that!!!!!!