spring perch clarification !!

[nstarry]

sombody in here said that the 1/2 ton and 3/4 ton GM trucks rear spring perches are the same
is this right ?????????? /forums/images/graemlins/thinking.gif /forums/images/graemlins/thinking.gif

 

[rhuarc31]

Yes in regards to placement, so if you're just swapping axle housings no problem. Rear axle tubes are different diameters I think so I dunno about fitment that way. I've been making my own from box tubing.

 

[Okiemuddog]

Yes, 1/2 and 3/4 are the same, 1 tons have a wider placement, but it is ane easy fix. Just cut them off and weld them back on at the right width. 1 tons also have a different shock mounting set up.

 

[nstarry]

so is there a diference in the years because my 72 3/4 ton had wider springs then my 74 k5 ???

 

[Beast388]

[ QUOTE ]
so is there a diference in the years because my 72 3/4 ton had wider springs then my 74 k5 ???

[/ QUOTE ]

Here is the break down on spring perches....

67-72 2wd 1/2-3/4 tons = 42.5" center to center
67-72 4wd 1/2-3/4 tons = 40" c to c
73-87(91) 2 & 4wd 1/2-3/4 tons = 42.5" c to c
77-87 1 tons = 40.5" c to c

I had to cut off the perches on my '77 3/4 ton 14BFF and weld on new ones at the 40" spacing to fit my '71 Burb. /forums/images/graemlins/waytogo.gif

 

[nstarry]

you just made my day thanks for the info /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif

 

[sled_dog]

anyone know the width on a newer IFS rig? I have to put a 14 bolt under one temporarily.

 

[Beast388]

[ QUOTE ]
you just made my day thanks for the info /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif

[/ QUOTE ]

Sure! /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif