I have probably read all previous posts regarding this issue. My '69 Chevelle SS396 4 speed is still having problems getting the starter to turn over when the car has been driven for 20 minutes or so. I have a brand new Optima battery, trunk mounted with 2ga.wire & all grounds & connections are fine. Remote solenoid, new gear reduction starter w/heat shield, new HEI module, new alternator, timing was slightly advanced, that has been corrected. I was wondering what size wire should be running from the remote solenoid to the starter. That is the only thing left I can think to change. Sorry about the long post, any help is greatly appreciated.