woudl the parts for these 2 most likly be interchangable? would say camshafts for a b18b fit onto a b20b? would a turbo for the b18b fit onto a b20b anyone?

I just answered the other post. Anyways yes it is interchangeable. The ls head is identical to the b20 head.

multifront offenseive ;)

Yea everything should be interchangable as the B20 head is like B18 head like mellowboy said.;)

Well the heads are not totaly the same. Things like cams are interchangable. But the combustion chambers are different since the B20 has a larger Bore.

Hence to put a B16a head on a B20 block requires some reshaping of the combustion chamber.