If you have enough installed height we have some single springs that would
work but Chryslers are sort of known for their short installed height
springs. That's why the one we show for it, part #73949, is a double. Part
#73949K1LUN is springs, retainers and locks. The main thing is you have to
have enough pressure to control the cam to whatever rpm you want to turn. I
would say 100lbs seat and about 300lbs. open. I would assume you want a
single so it will fit on the head with no issues but a double will last a
lot longer. We don't have any singles unless you can get the installed
height up to 1.800" or so. In that case you could run #73126.