Proform 750 double pumper issues

[XH29N0G]

I think it probably is fine as long as the restriction is not smaller than the holes on things like the IFR and other metering orifices.  My guess is that it is perfectly fine, but I suppose the holes could also be enlarged. 

I will be very interested to see how this turns out.  My guess is you found the solution, and that was also probably the reason for the carburetor being sold.

[Paul G]

I put the proform back on my my 72 with the AFR gauge. I can see what the carb is doing on the 72. The new metering blocks from Proform are on the carb. Adjusted idle mixture and idle speed. Stumble and backfire issues are gone. Drove the car, no issues. The carb was running very rich but I am not surprised. It is too much carb for a 360.

Not sure what was wrong with those original metering blocks? Possibly they were not the right blocks for this carb. Maybe they were supposed to be on a smaller carb or something?