After about a year of never having the problem, I am suddenly getting starter issues. I am getting heat soak that is really causing headaches! I have replaced the starter at least twice and still, any time the temp gets above 160 degrees, it will not turn over.
Am I just getting a run of bad starters, or is there another issue I need to look at?

 

Try a starter heat shield
http://www.summitracing.com/parts/mrg-3678/
or insulate the starter with a heat blanket.

If that doesn't work you can always go the remote solenoid way that guys use to cure SBC hot soak problems
https://www.thirdgen.org/solenoid
http://www.novaresource.org/starter.htm
http://www.chevyhiperformance.com/te...x/viewall.html
http://www.crankshaftcoalition.com/w...-_no_hot_start

 

i had this problem. i think the problem is the relay thats part of the vats system.anyway i wired in a ford solinold in and never had a problem since.

 

Had the same problem with my 86 IROC. I installed a mini-starter, forget which brand, but that cured my heatsoak problem and starter starts car everytime no matter how long ive been running the car.