Jeep Strokers

Anybody used the valvespring with part-no : P48760620 it has same inst-height/O.D/wirethicknes and uses the same retainer as the P5249464,what if any is the difference besides that the 620 is marked with lift .480/.600 instead of the 464's lift rating @ .400/.525 and what do they meen with the 2 different lift-numbers.

http://www.monicattichrysler.com/comers ... oduct=1457
On this page they have a chart where both those springs are shown

Those are for a 5.2/5.9L Dodge IIRC.

They have a larger Outside Diameter and Wire Diameter. I believe the chart shows this also. I am not sure if that will require machining to the head or not. Im sure others will chime in.

Probabaly more people hopping up a 5.2/5.9 to the max that would need a higher lift spring. Just a guess. What are the spring rates and seat loads on those compared to the 464's? Are they stiffer?