I've often wondered what exactly the difference was in the 67-69 9.2:1 318 and the 84-ish to 91 9.2:1 318 to differentiate them from the 8.8:1 318's from 1970 to 1983.
The piston part numbers are different, and the heads are different, but I've never been able to compile exactly what portion is attributable to what part.
