If you do the head I would also suggest using the high volume VE oil pump and matching balancer. Only the P11 VE cams are going to work on DE/RR bottom end swaps. If you want N1 cams you will need pistons with valve reliefs (20V/VET or aftermarket) I just did a full rebuild on my RR engine and kicking myself for not putting a VE oil pump in while I was in it.