93turbotegSAV

i have a 1993 turbo teg with a bad motor if i was to put a b18b in the car would that require any modification? maybe even a b20b? or is this a bad idea? the reason i ask is i can get a b18b for a fairly good price for around where i live i cannot find a b18a that is good and not a rip off for a good price.

anything would help

thanks..