I'm looking for a pump that has abetter flow at idle. I've used flowcooler before on a jeep engine with good success. So what is the difference between these two pumps? http://store.summitracing.com/compare.asp?N=700+4294924500+4294838996+4294908256+400299+115 Both fit a 350, both fit some v6's, but i need it to fit a 340. Is the nearly $20 extra really needed, or would either fit? Also, if you know of another high flow pump, I'm all ears! :TU: