do I need a spacer?

what?
I had to lower the floats because I had to put too much effort into getting the gas to come out the side of the carb while the car was running. Its a 750dp


Ok hold on a sec.... If you take out the sight plug and the fuel in the bowl is so low that you have to give the car a hard shake for fuel to come out you rase the float not lower it.

You have had nothing but problems with this carb.