<<<I see you got the matching springs, good>>>>
intake sealing, but your cam lift exceeds your stock spring height.
"..
The valve stem seal and seat to retainer clearance is usually 0.465 to 0.470 max. So cutting down the seat and stem guide boss are required on Magnum heads.."
"...
Another option is to run 0.100" longer valves, but you will need to change pushrod lengths. Rocker geometry will still be safe if you stay below that 0.100 length. If you stay with your stock springs due to wanting low end torque for your Moab or Bear Trail machine, then for a safe setup when choosing a camshaft, keep the lift around 0.450". That gives you 0.060" or more safe bind clearance as the stock spring will bind at 0.520". That is why 1.7 roller rockers work well on stock cams and springs.
- Stock coil bind 1.125" @ 0 .525"
- 1.650" @ 85lbs stock
- 0.480"/1.170" @ 218lbs
So as you can see a 0.480 lift cam list only gives you 0.045" safe clearance from bind on the stock spring. Better to stay safe, use a cam with a mild ramp lobe profile so the stock springs follow it closely and keep the lift around 0.450". Here is the Mopar spring info:
- 1.425" od 1.055" id
- 26 grams Mopar retainer
- 1.640" Installed Height @136lbs
- 1.150" (0.500" valve lift) @329lbs
- .990 bind "
