66/440
Well-Known Member
I am aware or the "HP" stampings used on 440's. However, I never heard of the "HP" being used on other blocks. I am going to look at a 413 that the owner says has the "HP" stamping. It is a 1962 block and I am wondering if indeed the HP designation was used on these early blocks and what that might mean. Was it used for sono-rams, or high nickel content blocks?
Any info would be appreciated.
Any info would be appreciated.