HP - when was it used and why?
Interesting.
The information you guys provided probably explains why a 67 A body with a very late build date has HP stamped on it.
So the letter I received from Chrysler with 383-4 HP 8-Cylinder is not the same as the HP stamping on the blocks, but it does mean High Performance.
I didn't think there would be a magic answer that solves everything, I thought it would be, well, what it is.
Thank you FABO.