I decided to sump the tank in the Colt.
Just from sloshing around the tank, this works way better than the tapped drain plug hole. I put the sump atty the lowest point in the tank, which happens to be the stock pickup tube location, also, centered in the baffles. I tapped it for 3/8 npt, and used a 3/8 barb. That should be fine if I want to go efi later. At Gingerman, even with ~4 gallons, it was starving for fuel around the corners. This should help. With only a gallon in it, even sloshing it, it still flowed with just gravity.
Also, the cr-z axle rusted pretty bad, making it weak, and snapped.