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10 years ago

Check out the forums section of your local GTO website or GTOAA.

12 years ago

Could be that you need to put a shim or two between the starter and the mounting bracket for the starter. When the car heats up it can change the angle of the starter sproket and can put alot of touque on the starter. Had this with my 69 after i put headers on it. Also see if your timing is set to far in advance. This will cause the same issue after it gets hot. Check the groud going to the exhaust manifold from the battery. That should not have paint on it where it meets the head.

realfine

12 years ago

Hi 1966gto I agree with dana5cars. Timing may be too far advanced. ( Does it sparknock ? ) , If so, too far advanced. Before changing timing, check your main electrical connection plug at firewall to make sure you have full 12 volts from battery and through fuse block.. Sometimes these tend to fry up in there and don't give you proper juice back to the starter. I had the same problem with one of my vehicles , and cut the wire and resoldered , and problem cured. Take care realfine

dana5cars

12 years ago

THE TIMING IS A LITTLE HIGH

23dodges10

12 years ago

Have you tried bypassing the ignition circuit with a push button that hooks directly on the starter. This would eliminate ignition and neutral safety switch issues. Does it have a heat shield? Are all the ground wires clean? When turning the key in the start position hold it there for a lil bit, any loose connections should warm up like an oven element. The trick is to get connection warm without melting wires....or burning fingers

retiredpartsman

12 years ago

try jumping at the starter if it works there you have wire broke inside insulation .the insulation expands just enough to break contact when hot and contracts when cooling down.