Put a heat blanket on the starter, esp. if its close to the headers. a sheetmetal shield is even better if there's room. My oem starter was acting up then eventually would just stay on. There was a week where I would start it, jump out, pull the negative battery cable to stop the starter spinning, and real quick hook it back up before the motor died.

When I went to a mini it would heat soak and start very slowly if I drove then parked and let the heat soak in. Later I had jacked my timing up to 22 initial with a new (hot rod) motor and put the battery in the trunk. I had to run a thick ground all the way to the starter mounting lug to get good cold starts. Hot starts with all the initial timing work WAY better with a separate button to crank the starter, then turn the key on once it spins good.

That's what worked for me!

Good luck

radar