[frankym]

I also had a similar problem on my big block. I rebuilt the starter, same problem existed. I put the heat shield wrap from jegs or summit and it helped a lot. You mentioned that the timing is right, but your pointer may be off and you're still a little advanced. Secondly, and what ultimately proved to make the biggest difference, I installed a new die hard gold batter, i think it had 100 cold cranking amps. This was the best one they made at the time. Since most of us always assume we have enough juice because the car always starts when cold, you need those cold cranking amps to overcome some of the resistance from the hot engine. If your battery is a no name especially, or if you aren't sure the age or the specs of the battery, get yourself a new top shelf battery from sears, costs like a 100 bucks and is always good insurance.