Not Ranked
Hmmmm,,,,, I was thinking the vast majority of 390's were hyd lifters. The 427's were mechanical only depending on year of motor, thus they required machine work if you wanted to run hyd lifters.
The "performance" 390's that pre-dated the 427 (EARLY 60's) were solid lifters.
I've never heard of anybody changing torque specs based on ARP bolts or high compression, just thought I'd check! I, for one, DO like to re-torque, I could be wrong.
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