I have a 73 c10 that came with a 454 originally (CCZ) but the current
454 is probably not the one that came with it...The 'partial vin' number on the front of the engine is
TO412TRH
37CE91593I think the T is Tonawanda, and 0412 might be April 12, ....
I want to make sure I am getting the correct replacement parts. What else can you tell me about the motor????