The standard "square-bore" for 4150's et-all is 5 3/16" x 5 5/8", according to my Holley manual.
Holley 4150 Bolt spacing
Need to move my regulator to the front of the carb to allow better access to the valve cover. Anyone know off hand what the center to center bolt spacing is for the two front studs? Single carb, traditional mounting(not sideways like some tunnel rams allow...)
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Yes, the narrower dimention is across the ends, wider is down the side.
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