I also think I've settled on the Elgin 1838 cam. Just not 100% sure what springs to run. Leaning towards the PAC 1215's. They tolerate 0.600" lift (the cam only has a max lift of 0.560") and a seat pressure of 105 lb at 1.800". I know LS6 springs are cheaper and people have had success running them on a 0.560" lift cam, I just don't know if they have enough seat pressure.