Ok, ive read the swap facts. Ive been building an LS/vtec motor and i think im gonna sell it. I have a DA (b18a) that has a blown head gasket. My question to the swap guru's is:

1.) What changes would be necessary(if any) if i were going to just put a b20 in it? i.e. motor mounts, axles etd.

2.) If i were to put a GSR or b16 in it what would be necessary besides ECU, harness ? Would i need to change the axles?

If i do swap it instead of replacing the head gasket i wanna use the Tranny already in it.

Any info is appreciated.