What cam to use in a 318

YY1 said

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.

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All my old Chilton manuals said the 70s and earlier 80s 318s were 8.6:1 and 360s were "advertised" as 8.2- 8.4 but then in the 80s some of the 360s were advertised as actually being below 8:1, the heavy duty ones in 1 ton trucks and such being listed amongst the lowest.
I wonder then if the ones advertised as below 8:1 were really in the low 7s.... My experience with engines from that era is as built they are all less than "advertised" CR.... Pitiful. No wonder some of these engines were such wheezing gas sucking slugs..... Not just talking Mopar either ...