Heat Soaked Starter
For 63-66 A bodies with 727s or with manual trans, TTI says you must use the RobbMc Performance starter #3005. It's what I put in my 65 Barracuda with TTI headers and I have had no problems with it. It is longer, but smaller in diameter than the typical Mopar lightweight starters. It ain't cheap, though - almost $400. It also won't work with a 360/904 combo.
RobbMcPerformance - Mopar Starter