92 super 5.0

well finally after fixing the over heating problem in my car another problem still hasnt gone away......wen ever i am done driving the car and the temp is over 180 the car will not turn over unless it is about 160 or lower...does anyone have any ideas....i bought a new alternator but i dont think that is the problem i was thinking mayb it was the starter and its getting to hot and wont turn over...if anyone has had this similar problem or knows wut might b wrong it would b deeply appreciated for ur input