I'm new to the pontiac world. Just bought a 67 coupe with a 400, 4 speed. It has a 1971 block and the heads are 1972 with 7K3 above the 2 center exhaust. On the front end of the head is the number 675 stamped in it. Does anyone know what the 675 stands for or maybe it has something to do with work done on it. The guy I bought it from said it had some engine work done on it but he did not know what all was done.

Thanks

Jeff

Numbers like that are generally stamped by rebuilders for tracking purposes.

That is what I was thinking

Thanks