This man speaketh truth!swedishfa said:the old b20a and b21a blocks are different than any other b-series motor. I had a b20a head that I was going to put on my b18a block, but the b20a head was totally different than the b18 head gasket. so if the b20a head didn't line up with the b18, I don't think taht the b16 or b18c heads are going to fit. you better use the b20b/z
can anyone back me up?