Street Ryderz
Well-Known Member
The older mechanical roller cams used 750 lbs pressure springs with the upper limit at 800lbs I don't know wtf your talking about but out Hellcat has 900 lb springs to be able to spin 7,200 rpm, wash out the lobes LOL!This is 500# it's a double for roller cams 600# would wash the lobes out of a 340 and not cheap... But if they fit I'm glad... But still waiting on RDM to pull something off... The LS motor valve spring is 400# little smaller.... ?? I've had 273 -360 Mopar in a bunch of stuff 66-82