Changing starter

I went for a good long-ish drive today. I have the MSD Start and Step set at -15 degrees. Cold start is no issues...2-3 pumps, fires right up. So then I cruise 15 miles or so, putt, putt into store parking lot. Come out 5 min later and it's real hard starting. It's like the MSD gizmo really doesn't do anything. I'm leaning towards a FBO bushing and going back to a weighted distributor.

Just for FYI: I did my cruise with no hood....temps stayed around 175.

My 440/505 does the same thing when I go to restart quickly after I shut it off. I have to hit the key a second time and it comes to life so far. I have the headers wrapped, (hate that stuff), and the starter wrapped also. Thinking about unwrapping the starter, and making a heat shield type guard to keep header heat off it. A guy on this forum suggested the starter wrap may be holding heat in .
I can pull my drivers side plugs and header loose and get the starter out, really a pain in the a-- tho .he