hi folks. I have a v8 sitting in a1978 k10 that came stock with a 6. first set of numbers k1020nts second set of numbers 081714 ?0?c437 . after the 081714 they get a bit rusty to see. I am going to try and high light them with some soap stone . and look in the back of the engine for the date numbers I think that's what they are called . any body up for a challenge need help thanks Robert j