Dude go with a b20 block, b16 head cause it flows better than a gsr or if you have the dough a type r head, get a integra type r tranny already has lsd and the gearing is sick my buddy has a type r in his eg runnin 12.9 with intake, vtec controller, fuel cell, omni suspension and no back seat and we've takin it to 150 and the tranny still has more left as with the motor...But back to your setup....B20 block, type r head, type r tranny and a chipped p28 that will be fast enough for you im sure.....