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Rear shocks behind the axle?

@anwat got a full pic of yours at rest showing the shackle angle? This is an old pic of mine but you can see the shackle angle (56" springs, 2.5" shackle flips bolted in the stock holes but swapped sides so the offset is rearward and 6" shackle), I don't know if the angle is perfect but it works well with no interference with the spring.

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32.5" in the front, 32" in the rear. How much of a difference will it make flipping the mounting brackets? Since it would seem you've played this game before, what would you recommend? I've only got 5" of uptravel from where it sits now, but like I said, I really don't want to change driveline angles and start into that rabbit hole.
 
Looking at your photo, it appears the shackle brackets are already moved back and flipped side to side.
Those are some long ass springs
 
not sure if they're flipped, but yes, they are moved back. They are the 4" brackets. Here's a shot of the whole thing as it sits. I'm guessing I'm going to have to move the brackets back further. Which means taking the bumper and all that off. Or try to find some shorter springs and go to a 6" shackle and try to keep the thing level.
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They definitely moved back appears to the rear holes of the stock shackle Perch location.
Not sure they have an off set would like to see a picture of ord similar to yours to compare.
If no one post one up I will when I get home.
 
Just so you know, this is supposed to be a 73 3/4 ton sub frame we're working on here.
 
Doesn’t look like swapping side to side is going to help you, if you put that hangar on the right side itll move further ahead not back, if I were you I’d switch to 56” springs….ideally you want the shackle to be slightly back sitting at right height like @cheavyk10 posted above
 
Chickntrk said:
Doesn’t look like swapping side to side is going to help you, if you put that hangar on the right side itll move further ahead not back, if I were you I’d switch to 56” springs….ideally you want the shackle to be slightly back sitting at right height like @cheavyk10 posted above
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Think that would be better than moving the hanger to the rear a couple inches? Will going to a 56 end up changing where the axle sits, or is it just going to put more arch back in the spring and pull that shackle forward? would I be able to get a spring that still has the pin 34.5" back?
 
Yes it will move the axle forward, most common 56" springs are 26" and 30" the stock 52 are 26" so even if you put the long side forward you'll lose 2".
Am thinking make the 64s work
 
IMO it kind of all depends on what all you do….I mean i don’t know what all was done to run the 64s? Did they just bolt them to the front stock hanger and let the back take up the extra? Some Suburbans had 56” springs stock so if yours did and your front hangers haven’t moved you should theoretically be able to mount 56s and have the axle centered….do you know what they did to mount the 64s? You said the springs measure 32 and 32, so That tells me that they had to move the front hangers ahead or your axle would be back 2” from stock? Is it?
 
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Front hangers are 26" from axle center with 52 or 56" springs. I'll get measurements from mine later cause I want to know.

Im willing to bet the front hanger was moved. But how far is the question.
I would take advantage of the longer springs to get an inch or two more wheel base.
 
Sorry to drop out, work keeps getting in the way of my projects. I'll get some measurements and photos of the front hangers today. I talked to a couple of guys last night, it would seem the best option is to move the rear hanger back about two inches, and just push out the rear bumper an inch to make room for the hangers. Going to have to drop the tank, which I was trying to avoid, but at least I can go to a in the tank pump and get rid of the one on the frame. Nothing is ever easy..... At least to me, that would seem the best option. Stand by for the photos/measurements on the current spring location.
 
If you have the room to do it that’s probably your best bet to alter the least
 
It doesn't shortcut the overall work needed but I'd consider trimming the bumper bracket(s) and redrilling that inner most bolt instead of pushing the bumper outward. Just sayin, sometimes an inch can be huge cosmetically.
 
Pictures of my 77 suburban frame. Stock front hanger. ORD 4" shackle flip in stock location, left side on right. 6" hd shackles
56" stock 1 ton springs, 2 bottom leaves removed.

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IMG_20220622_092614.jpg
 
Not sure, but I'd almost be willing to say the front hanger has been moved to the rear. Yours is sitting half inside the body mount. Mine is completely to the rear of it. It's an aftermarket hanger, though, so I'm pretty sure it's not in the stock location. from the center of the axle to the center of the front hanger bolt, it's 32.5".

Point taken about the bumper...I can make that decision when it comes time to put it back on. That'll be the last thing to worry about. Might have to modify the bracket a little. Any need to do anything else to make the frame more rigid back where I'm looking at moving the rear hanger to....should I box it or is that just going to give me a weak spot where the boxing ends? It will have the bumper to keep it from twisting, seems it would be plenty rigid as is to me.

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I expected the fronts to be moved forward. That's crazy how far back has the axle been moved.
Something we are not seeing, mystery for sure.
 
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