I have around 120 lbs at stock installed height hughes springs... can't recall the PN... I think they are 1016... got them used on Carlisle last year

rest of setup

-Magnum 400 engine standart bore sleeved ( 25K miles on it, so will be just honed )
-KB240 pistons
-850cfm stock TQ carb
-MP 280/474 camshaft ( resto HiPo cam as back up )
-166K TC ( 175K TC to arrive someday as backup )
-basic 2186 eddy intake
-452 heads ported and milled ( dunno how much yet, will be defined when pistons are measured in the holes )
-stock HiPo exhauts manifolds
-exhaust pipes already upgraded to 2.5"
-Summit double timming chain setup
-3.55 SG axle
-27" wheels
-Lunati 75713 retainers
-Stock valves
-Metallic headgasket
-stock pushrods