I think these springs are around 750 lbs over the nose. They were 290 on the seat and 636 lbs/inch so math works out to 752 lbs. A little stiffer than what it said on the box for whatever reason. I'm seeing about 0.030 deflection for some of the rocker arms but the T&D design appears to be pretty stiff.
What spring are you using? PAC? model number? FWIW As far as what ratio the rocker is verses what the manufacturer says etc. I call it mathematically whatever it winds up being as determined by the checker springs in relation to the cam lobe lift and lash. The as assembled 'real' spring just identifies the deflection which I have typically seen .025-.030" on springs around/above 800lbs. it is what it is I guess
