I can tell you guys that I removed a 422 W9RP motor and replaced it with a G3 that was a 6.1 block and heads stroked to 426"

my car weighed 3250 with 727 and dana on drag radials with 456 gear and exhaust. same car combo for both motors

W9 went 9.63
3G went 9.61

pretty darn impressive for stock block and heads