Well mine is a Gvr4 6 bolt block, and the aircon x-bracket that bolts to the block is evo 1-3. Aircon compressor is evo 1-3. Belt tensioner is Gvr4 because using a modified Gvr4 front engine mount (timing belt side), Aircon lines are half stock GSR (hardlines between aircon dryer and condensor) and the rest from the 4G63 Evo 1-3. Mine also uses evo 3 engine and interior looms so the aircon electrics just plugged straight in.