dont know if its the same for 47-53 but i bet it is being the same axle setup.
here;
1/2t gmc-
1/2 degree twist
kingpin hole ID-.867-.8677
kingpin od-.866-.8665
tie rod end spring free length-3/4"
resistance @ 37/64- 250-300 lbs.
camber 15/32
camber 1'30"
king pin inclination 7' 10"
steering arm above spring seat 1 3/64
toe-in 1/16-3/16
steering arm ahead or behind axle 1 27/32
steering arm center to spring center 3 47/64
tie rod ball center to backing plate 2 9/32
caster 2'
king pin inclination 21/32
CHEVY;
front spring specs;
38" long
1 3/4 wide
8 leaves
3 clips
caster 1 3/4' +- 1/2'
camber 1' +- 1/2'
steering on turns;
outside 20'
inside 23' +-2
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