I retorqued the headbolts on a generic 327 SBC motor way back in the day. Don't think I actually made it through the whole set. It was pretty obvious that the elasticaty/stretch of the headbolts were holding torque very well

Aluminum heads tend to expand more and may need it. I'll check that once I put mine together.

I always recheck intake manifold bolts periodically since I have found them to be loosened up on many used vehicles I've bought. They have a lower torque value to begin with.