Im planning on doing a swap on my 99si. I just recently came across a 2000 gsr head and tranny but I dont know what block to buy. I figure someone on here knows how to go about this. I just want to know if its worth to buy a b20 block or ls block for this swap. What computer do I need for the swap? Can I use my harness? I currently have a b16 computer and harness. Should I just get an ls block and put some gsr internals? Thanks for ur help!!!! Hope I could get the answers I need.