Too much heat on the starter

Hello, I just finished the resto on my 69 Dart and I am now sorting out the few things that need attention. I have a mildly built 340 with TTI headers and a mini starter. I am having some issues with the starter getting hot and not wanting to start until it cools down. My question is is there something else besides the blanket wrap over the starter? Is someone making a shield to go between the starter and header pipe? There is about a 1/2" between the header pipe and starter.
Thanks Bob