If you've taken good care building the engine, the only thing left to chance is the oil. A few years ago, oil manufacturers drastically reduced the amount of phosphorus, zinc, and other additives in our oil. The additives that were killed meant that our flat-tappet Jeep engines started eating camshafts. This Amsoil Dominator Racing Oil (15W-50) has more additives than regular oils used to have and great shear characteristics. In an engine this gnarly and expensive, it doesn't pay to take chances on running cheap oil. A high-volume oil pump is recommended for this kit, but none were available at the time. So, this oil pump is a Mopar pump that we got from Summit Racing which 505 Performance then had to modify so it would crank out more pressure.