Heat Soaked Starter

From my experience, starting from 1980 thru 1988, Chrysler made an aluminum starter heat shield. Tight fit around the starter and works quite well. Consider updating your battery to starter cable and also the negative cable too? Had similar experiences with my drag only 360/904. Usually hit the starter with spray bottle of water. I later moved to fenderwell headers and all problems went away. Fabbing fenderwell headers for street '65 now.