have a 69 400 4sp with HEI I seem to have the timing curved in ok car runs good does not over heat normally unless it gets over 85-90 F outside
however after running around for a hour or so it really does not want to start after shutting it off ( slow cranking not battery) It does not seem to be too hot I am at about 190 -210 F temp does go up when shut down prolly not that unusual Maybe just a normal issue after driving stop light to stop light trying to see if there is anything to do its currently 9 degrees in MI so its obviously in storage now
Pontiacs have an inherit hot start problem, they generate a lot of heat at the starter, sometimes it works for years and then as the solenoid gets tired you have issues. Some guys replace the starter, some guys go to a hi torque starter ( I did), some guys go the Ford remote solenoid set up route.
There are two separate hot start issues. One is where the solenoid doesn't work and you turn the key and there is nothing. The second issue is slow cranking. For some mysterious reason pontiacs can be much harder to turn over when hot than when cold. I solved the slow cranking issue with a 1000 CA battery and 1 gauge cables. I have a theory that for high compression motors, when cold the lifters aren't pumped up so the intake vale closes sooner and the compression is lower making cranking easier. When hot, the lifters are pumped up and the cranking sees the full compression.