You can certainly tell it is summer time. This is the 3rd request for help in the past couple of weeks regarding the small block Chevys!

I would guess that heat is your enemy. Either the heat is keeping the solenoid from working correctly, assisting the timing in keeping you from starting, or giving your wiring difficulty carrying the necessary amps to get the job done.

You might want to take a look at these links to other posts...the idea of a remote soleniod will probably eliminate your troubles. But before you go to the trouble, you might want to make sure the timing is set correctly. The timing could cause this symptom as well. If the timing is on, then make sure your battery cables are not loose and the right gauge. Again, heat is your enemy. So if the cables which carry the load are under-sized then the heat will halt the amps from being transferred to the job at hand. If the timing and wiring are good to go, then moving the duties of the soleniod to a remote location (away from the engine or exhaust heat) then you shouldnt have any problems taking care of the starting whenever you request.

Here are the links...

http://www.clubhotrod.com/forums/sho...&threadid=1582

http://www.clubhotrod.com/forums/sho...&threadid=8035

Hope this helps!