im looking into doing a gsr head swap onto my 2000 dx, and wondered if there were any differences in the b18 blocks or if it was just the internals that were different in the blocks. would like to upgrade pistons and rods also eventually to higher compression also and google just wasnt working for me as to finding the answers i was looking for. also, would i need to get a gsr wiring harness and computer to make the vtec and everything work properly?