Hey guys. Im looking at doing the Explorer head n maybe intake swap. I'm looking at a Ford E-cam (220/220 @.050 .498/.498 lift), a Trick Flow "stage 1" (221/225 @ .050 .499/.510 lift), and a Crane 444221 (216/220 @ .050 .533/.544). I am looking for some replacement springs for the heads. Whats a good inexpensive spring that can handle this type of cam, and where did you get 'em? Also I might be wanting some stock type roller rockers. I'm not sure but the TFS cam may be a little big, and the Cran Cam has alot of lift. What do you think on a stock 5.0 bottom end with the P heads and Explorer/Cobra intake?