[F'in mine]

The guys at Autogear are knowledge and helpful when I rebuilt my M20 Muncie for the parts I needed.
Not trying to sway your decision in trans selection but maybe you'd be better off with a TKO600 albeit a few bucks more. Higher 1st gear than the M20 plus with the cam it might be better for you, cruising as well. Plus the 600 bolts up to the stock bellhousing and utilizes the stock Z bar.
Shop builds are nice but kudo's to you on your home build, car's looking really good!