OH! on a side note disclaimer... on the SB roller whiplash cams. Hughes said they have NOT or can NOT recommend this cam in a pre-mag engine as it is for a 92-93 5.2 magnum engine. they have no info on this set up or any results. all my first hand experience and results. all good and great longevity. almost 300,000 miles on my first whiplash roller cam. been in 3 pre-mag engines for total of daily miles.

I also use a comp 901-16 spring on all of the whiplash SB rollers cams which they would not recommend. I have had no issues or valve float with them and run them hard and many miles.