for everybody that is using offset shackles

bob mCcarty said
u keep beating this horse to death , but there are 3/4'' offset spring hangars----------get over it dude !

No, there are not 3/4” offset hangers. There are 1/2” offset hangers and 3/4” offset shackles, that’s the way the MP
kit is made. I have the MP “3/4” kit on my Duster. I even had to clearance the frame rail to get them to fit because of the poor design and the large bolt on the inside of the hanger. I’ve compared those hangers side by side to the DoctorDiff 1/2” kit. Not only does the DoctorDiff hanger fit better, the offset at the front hanger is the same- it’s a 1/2”. Which means, the clearance at the front corner of the tire only increases by about a 1/2”.

So even if you do get a 3/4” offset at the rear shackle, you only get a 1/2” of offset at the front, and your tire still has to clear the most restrictive point. So the 3/4” offset is in name only, because you only gain about a 1/2” of useable clearance.

oi81b4uu812b4 said
I am always wondering why the tire clearance issue comes up when people do spring relocations.
The correct answer:
These cars had +/- 1/8" tolerance in the sheet metal assembly on the assembly line. So not everyone will have the same answer. And what fit on ones persons car may not fit someone else's. But it also depends on if your tires are closer to the spring in the front or the back. So measure your car.

I would agree with Bob McCarty on this, as I've measured low millage untouched or wrecked cars. While you can move the front perch in 1/2". Depending how your spring sets itself in the rear hangers will dictate how much clearance you have for your tire. A 1/2" front perch relocation & 3/4" offset shackle could give you 3/4" more tire clearance.

View attachment 1715757308

Except A-body springs are parallel to the frame. So, again, move the front in a 1/2”, move the rear 3/4”, and the most restrictive point only moved a 1/2”. Yeah, there can be some differences car to car, but that’s true with or without a spring offset. The MP spring offset being advertised at 3/4” is a gimmick.

Car to car differences might effect some tire clearances, but it’s a moot argument when it comes to manufactured parts. Because MP wouldn’t make a 3/4” offset hanger that would only fit cars that left the factory a 1/4” out of spec. Might there be some cars out there like that? Sure. But the hangers are still a 1/2” offset. Which means even if your car has more or less clearance in some places than another, the spring offset moves the spring a 1/2”. Because that’s the offset built into that hanger.