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To clarify: it got 14mpg with the carter and the NOS dist installed then ONLY the carb was switched to the holley (same dist) & the mileage went downhill?. Same ported or non ported for the can? I'm assuming there is a good reason why you dont put the carter back on there. those 1920's are so simple/fun to work with. I would wanna get to the bottom of it just for the satisfaction. I'd get some jets and recheck the float (level/saturation)/no base gasket or vac line leak. Holler how it turns out. not sure the 35 is right & I have one & I'll see if I can pull the bowl & see what jet is in it (not sure what year it is) but what I have outa tell us something. EDIT reread & saw the "terribly". describe that



Robert that's correct, only changed the carburetor to begin with. The Carter was remanned and was very wore out. I also prefer the simplicity of a holley. I ordered a #53 that I will compare and put in. Not sure what you mean by ported or non ported can. I will also report back if the distributor change fixes it.