My personal opinion is the early 5.7 is the best choice for boost. Thick cylinder walls and a smaller bore. Better for complete ignition of the boosted mixture. Top Fuel motors are 4.310 x 4.500. There's a reason they run the small bore.
Before the BGE/Hellcat block, I would agree 100%, leave the 6.1s and SRT392 blocks to the NA crowd. Now A budget build lower RPM 400CI and under, your a head of the game if you use the older 5.7 block.....you have a better chance of liftting the heads before you hurt the older block...with good internals.
Higher RPM Short stroke build 380-410Ci the BGE would be a great block to use , look at the power the Hellcat/Demons are making.
3.9-4.00 inch bores are what a lot auto manufactures are using and have gone to , it's a better bore size to keep emissions down.
Interesting point about the Top Fuel , Bore/stroke ratio equals .957, Bore stroke ratio for the 5.7 based "392" 4.05 crank is .967 and 4.08 is .957, to get that with a stock 4.09 BGE/Hellcat you need a 4.25 crank(.962) need a 6 inch rod to get a 1.14(1.15 zero deck dry) Comp Ht, and 6.07 length rod gets you a 1.08ish..but both are horrible Rod ratios
