The tranny will bolt right in. Are you planning on dd or track? Gears are shorter than the ones in the ls trans. You will benefit from the shorter gears but idk if you want it in a dd.
Ive been told i can put the LS 5th gear in for gas milage. And just keep everything else b16 gears. If i did keep the b16 5th gear what kinda rpm in 5th would i be around. the LS runs around 2500rpm at 65mph