Here is some info for you. Maybe some of it can help. I have used TTI headers on several cars. Here are two:

1969 Super Bee. 440, 4 speed, 11" flywheel, cast iron bellhousing, TTI 1 7/8" headers, Carquest/Advanced Auto starter (part number 17466SN).

1966 Satellite. 426 Hemi, 4 speed, 11" AND the 10 1/2" flywheels, Lakewood bellhousing, TTI 2 1/4" headers, Carquest/Advanced Auto starter (part number 17466SN).

Everything fit beautifully on the Super Bee. No modifications necessary.

I did have to modify the Lakewood on the RH side to fit the headers (as per the TTI instructions). Everything else fit perfectly.

The starter I listed fits and works great. Super small and super strong.

Stan