just a side note -- some high volumn oil pumps require a cam button or end plate to keep them in the block ( the camshaft that is ) - also they are real hard on the dist gear if it has one and the high vol pumps need a hardened drive shaft as well -- the roller motors have end plates because - the way the cam is ground ( flat across the lobe ) - with out it the cam can walk out if not held in place -- flat tappet cams are angle ground so the lifter turns and the cam is than driven to the rear so gear thrust against block is used -- jz
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