ok i know its been posted before but im just curious if i comprehended it right. I have an 83/4 outta an 69 roadrunner i used to have. so would it bolt right in or are mods are required. i found tech sheets that look like there less then 1/2 "off.could you guys help me out thanks
8-3/4 swap.
- Thread starter kwobbler
- Start date
Locomotion
Well-Known Member
I welded the spring seats in place after hanging everything with E-body 3/4" offset shackles in an F-body. But I read that you could do that with certain B-body housings without having to move the spring seats. The 3/4" move at the back would move the middle of the spring about 3/8". A little bit of "massaging" may still be needed.
The 3/4" offset shackles actually straighten out the leaf springs because they are toed-in from the factory. You get a little more tire clearance at the back. There is enough "slop" in the OEM front brackets & bushings to where the slight angle change doesn't hurt anything. It was in a drag car and it worked fine. But I re-did it to straight shackles and proper offset wheels when switching to a Dana 60 because the offset shackles weren't legal for the class.
The 3/4" offset shackles actually straighten out the leaf springs because they are toed-in from the factory. You get a little more tire clearance at the back. There is enough "slop" in the OEM front brackets & bushings to where the slight angle change doesn't hurt anything. It was in a drag car and it worked fine. But I re-did it to straight shackles and proper offset wheels when switching to a Dana 60 because the offset shackles weren't legal for the class.
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Oldiron440
Well-Known Member
What he said works!
Aspen500
Well-Known Member
Only thing you really need to do, IF you keep the ISO mounts, is enlarge the centering hole in the spring perches welded to the axle.
