[HWYSTR455]

Originally Posted by chiphead

Correct, the RPM accepts spreadbore carbs but has the 4150 bolt pattern too. I did lay the opening back and knife edge the center divider to clear the spraybar pattern. I had to gouge and blend the carb pad at the ends of the center divider, so the spray pattern will spray down the plenum.

That's what I did too, just like you did, laid the plate on there and smoothed all transitions, and knife-edged the divider. 4150-type carb tho. I ran a NOS Cheater plate initially, then went to a NX perimeter plate, but never filled the bottle. I had no issues though with the gap from an open plate with the RPM (with a 4150).

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