Holley 1920 issues

I blocked off the line to the booster today and noticed no difference and can not find anything that the air cleaner is touching so time to check the wet float level next I'd bet money that's where the problem lies is in the float adjustment.
As far as the brakes the only thing I have not replaced on the whole brake system are the rear brakes and booster so I'm off to the parts store to get new wheel cylinders shoes and a spring kit install them bleed the system then go from there.
Thank you so much NJ & nm9 you have been a very big help !!!!