I've got a used but good 383 shortblock and OEM heads, both have been rebuilt at some point in time by people I bought them from so I don't have any details on the machine work completed. They are going into my turbocharged Fury as a small upgrade.
Do I need to be concerned about the surface smoothness to use Cometics - I don't know what the machining was finished at on either. Was running 12psi on the smog engine, looking to be in the same range on this one as well (retaining water/meth injection installed in the car).
Current engine is a smog deal with 8.5:1 CR with .020 gaskets that lived just fine. New engine is going to be around 9-9.25:1 if I use the C5461-040 gaskets I already own.

Thanks!