I recently rebuilt my engine. When I try and start it, it immediately floods. The only way I can start it is to crimp the fuel line and then uncrimp it after it starts.
The only thing I can think of is maybe I didn't setup the fuel lines right, but once it starts, it runs seems to run ok.
Any ideas what the problem could be?

 

common to have flooding on a newly rebuilt motor, unless you used new housings, plates and seals.

The common matter is to interupt the fuel pump during cranking until the motor is broken in. I think there is a write up on the RotaryResurrection.com website.