"How to Build an Engine, cont." " " "For accuracy, it is not important what engine you start with. Whether" "you start with the 5HP-BRIGGS, 302-EFI, or PRO-STOCK, you will get the" "same performance when all specs match a 351W. The only advantage of" "starting with the 302-EFI is you will have to change fewer specs, and" "any specs you do not know will be close to 351W specs." " " " " " "