I was wonder what the differences between the B7 and B2 motors are as far as the internals and the head.. Mainly I wanted to find out because I have a B7 engine and head in my crx now, and I wanted to try my hand at port and polishing my old B2 head.. Then if they are interchangable, slap it on the B7 block to see the differance on the dyno.. Anyone know..