Take note of the base plate design on this pump, it has been available for a few years now and is worth seeking out. It has the shaft supported by the base plate along with the pump body instead of just the pump body as was the only previous option. This design is also available for 289/302. It is a much better design, made by Melling.
http://www.precisionoilpumps.com/ima..._Race_Pump.jpg