Carter 750 float level

Finally got the carb on the car last night. On startup it was pulling fuel through the boosters until I opened the choke plate about 1/3 (electric choke). Manifold vacuum was about 5" at 750 rpm. Idled for a minute or so, then died and wouldn't restart. Motor came with the car, I know almost nothing about the internals, but the cam's somewhere in the .480+" range with a good bit of duration. IIRC initial is 16-18 degrees, MSD 6al & billet non-vac advance distributor. I'll try it again later, lots of other priorities while I'm home this time.