just finished engine build got running but when it gets up 2 temp and runs for a while i shut it off and it wont start until it cools down , its not timing ive checked that its got good battery ground and 2 gauge battery cable it just turns over really hard when hot ive heard from a couple of guys that with long tube headers it can over heat the starter is that true and would a hot starter cause this problem

 

You know something i have the same problem i have a 1992 Gt 5.0 ... And it every time i run it for a awhile it gets to hot and wont start...?
Sometime i run it for a while and it will start ,,, But it make a wierd noise as if it was already Engaged? Like a scratchy noise ...
I went to a mechanic he said it was Definitley a starter but i didn't replace it yet cause i wasnt sure?

If i but a new starter i hope the problem go's away! im sure it will, but im thinking maybe we should wrap the starter in a High Temp Tape cover or something that it wont get hot try that let me know how it goe's then i will do it lol!

Yes you are my ginny pig

 

Had that problem manya time, if its not the starter,which most likely it is, Check your solenoid. Ill still bet its your starter though.

 

They sell sheets of heat wrap specifically to sheild starters. May be worth a shot for around 20 bucks.