Lift info for 66-79 F100's, F150's, & 78-79 Bronco's

[stink bear]

Just some info gathered while looking into a lift kit for my 72 F100 4X4. I thought it might be useful to others.

Jeff's Bronco Graveyard: 1-2" lift coil springs .6875 bar dia, 320#/inch constant rate
Skyjacker Softride: 2" lift pickup / 3" Bronco coil springs (172) .688 bar dia 330# @ 13-15" / 400# @ 10-12" variable rate
Rough Country: 2.5" lift kit .781 bar dia 595#/inch constant rate

I was told by a tech rep (I can't remember which outfit) that the factory spring rate was 220@/inch. My coils bar diameter measure .63.
I am trying to get specs for Eaton MC921+2" coils. I will try to remember to post it if and when I get it.
This info was gathered from calling and asking for technical specs, to the best of my knowledge it is accurate but I can not guarantee it.
Brett

[stink bear]

EATON MC921 available in stock height, 2"under, 1" under, 1" over, and 2" over. .687 wire dia 270 lb constant rate