Voodoo cams-good read

Hey 340srule, How did you like the .494/.513?
My son was eye balling that cam for his 360 with around 9.5-9.8 to 1 compression, Air Gap, big holley, ported small valve J heads etc. Trying to get his Demon into the high 12's to fry some local Rice LOL
Also what valve springs did you run?
Sorry if I high jacked this thread.