what are 351s usually bored out to?
what blocks(compony wise) can take the most hp

my feauture plans are to bore out either a 302 to a 347 or a 351 to something and twin turbo it im going to buy a new block so i figure might as well go big just trying to collect the more information

 

Stock B&S is 4.00X3.50

Plenty of stroker kits available to go 400+CI & 500+HP

 

4.030 and 4.040 are pretty common

i think you might be confused with the difference between bore and stroke

 

4.030"-4.040" is about it for a stock block. 4.17" is usually the stroke limit on a stock 351. A Dart or World block will handle 2000+hp. Those are the top iron blocks.