After years of messing with a tank I built for our modified roadster that was theoretically correct, I broke down and bought a 4 1/2 gallon Peterson tank on eBay for a song. The difference a professionally designed and built tank made was night and day as far as de aerating the oil. Tall, multiple baffles, swirl inlets and a stand pipe up the middle make it work. Be sure to follow the makers advice about vent tube diameter and routing.