Spudders when it's hot..

I just checked the intake bolts and I got a small turn out of most of them.

The carb and gear swap was done by a reputal speed shop. I didn't have any problems with the carb at all. I drove it home from there and it ran fine. I'm wondering if these intake bolts are the issue..

The car still have a 4200 stall in it and with the 373s it's a pig. I need to swap the stall out for like a 2800-3000.