Just curious what valve springs you guys are running with your 60303 voodoo cam. I am running the springs that came in my eddy heads with 105# seat pressure and car is breaking up at 5700rpm. Called Lunati and they recommended a double spring (73124k4), but I noticed the complete kit they sell with that cam comes with a single spring (73815LUN).

Would simply shimming my existing springs to get seat pressure up be a good idea? With a .060" shim I would be at 120# seat.