For sale is a 3250 Kerr plunger pump crankshaft. The crankshaft has been magnafluxed and ground to its final grind of 2.377 by a professional machine shop.   You will have to buy .060 crankshaft insert bearings and have the aluminum rods that accept under size inserts to use this in your pump.  You will also have to purchase main bearings, Timken 475 & 472A.