ok i bought a (96 jdm itr) but i looked around the motor the code on the block is b18c now i looked in back of the motor and it says p72? then i look at the manifold it is p73 ? the head code is pr3-2 and it comes with a lsd tranny so then i look at another motor that is a 96 type r and everything is the same thing can somebody enlight me