spring on the left is the stock valve spring in eagle head. at 1.90 IH it has 125lb. open @1.40-310

spring in the middle i bought just to check them out.thy are new replacement spring for eagle head. paid $30 for 16 thru mopar-wholesale. they came with a .040 spring seat. 2.0IH -105lbs, 1.90IH-145lb, open at 1.40-330lb. coil bind at 1.30

on the right is a PAC1219 spring. cost about $200.
1.90IH-100lb, 1.80IH-130lb, open 1.20-330lb. coil bind 1.10