Quote: HPP was referenced back in the late 50's. Personally I could care less if it is stamped HP or HP2, does not mean a thing unless you match it up to a known six pack VIN. We have all seen C bodys with both stamps.
Ok, well, beats me, I don't know what the HPP meant in the 50's, never dug that far back. I completely agree on your statement about the VINs.
Quote: What does the arrow mean, the stamp that looks like a sideways letter A?. It's on my block too.
The "arrow" is just was it appears, a sideways "A", according to Galens White Books it means the engine has 20 er cylinder bores from the factory.
