sbc 350 cranks slow when hot
You can try the solenoid first. What is happening is you have the big GM starter with headers installed. There is no room for cool air to circulate around the starter and you can look to see the headers are against the starter. There is 3 options. 1. wrap the headers causes headers to rust. 2. install a heat shield on the starter. 3. Replace with a mini-starter that provides room for air flow. Good luck.