I am just want to know is the difference between a 1973 318 and a 1972 318. My uncle did a engine swap in the 80s he does not want to talk about it. I now that the engine is a early 70's engine. Is there any physical ways to tell the engine years apart.

 

Research the casting numbers on the heads and blocks will give you the basics....

 

Welcome.

Looked up some stuff and found different P/N's for Pistons and Intake Manifold, likely very little difference just a little juggling of compression ratio and EGR/emissions stuff. Both should still have floating piston pins as P/N's show that changed in 1974.

I could say with confidence that they are virtually identical.

 

Thanks for the help.