I know they are expensive, but do they work welll? Do I have to restrict the input? Are they capable of stopping camshaft end play and how do you take some play out? Spacer placement, or shim the pump drive plate towards the pump? I am only using it bacause I have a new one and impellor and I think the big motor needs more cooling.....Thanks for the help. I have always force fed in the past with an electric assist pump, so a pump is new to me and I hate to relie on an unknown.