I'm converting an EFI to carburetor. I have an HEI style distributor which cam off of an early 302. The engagement onto the oil pump shaft is about 1/2 inch less that the stock EFI distributor. The oil pump shaft looks like it has snap-on type locking ring which would be positioned just below where the stock distributor shaft is seated. Is that designed to prevent the shaft from "walking" upward? If so, the HEI distributor would not stop the shaft from moving upward. Do I need a different oil pump shaft?
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