Thanks to all that answered, I have lots of ways to skin this cat. From just a washer under the bypass spring, which I figure will help, since you guys say so, to adding the five lobe Milodon pump segment, to going dual line since the 21815 unit will allow it with my tight clearances. I went ahead and ordered the 21815,to get all those options. I am going to use the 21815 and run the single line to it, since it makes a straight on entrance to the lobes, not the 90 degrees of a stock type pump. Also I will start with at least 75 psi cold, unless you guys think I should shoot for 80 cold.