North60,

I had a smiliar problem with my engine. One day was talking to a guy who used what he called an "old trick". It has worked GREAT for me:

Apparently older Chevy starter solenoids draw a lot of current during starts, when they are hot, they require even more amps. Ford solenoids on the other hand do not draw as much current. He told me to wire a Ford (1960's era Mustang solenoid) solenoid in series with the Chevy one and it would get rid of this problem. I gave it a shot and it works like a champ.

I am at work right now so I don't have the part numbers or schematics that he drew out for me, but when I get home I will take a couple of digital pictures and attach them and the schematics as a post. My starter used to hesitate slightly or even click sometimes when hot, now it roars to life no matter what the temp of the engine is.

There might be someone else out there who knows about this "trick", the guy I got it from used to race Chevelles and he did it to all of his motors. Mine engine started life in a 69 Chevelle...