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Will these require me cutting / grinding / or drilling my 69 type "O" rear differential ?
Is it a simple install or more than simple / like it would be easier to remove the rear end for install ?
Drill the webs on housing on each side of pinion. 3/8 holes I helieve
Thx
do they sister onto the Upper Arms or replace the upper arms ?
The upper control arms are still used; the control arm attaches to the bushing on the end. These raise the control arm mounting point, which then changes the "instant center" of the rear suspension.
Below are pictures of one of my O-Types that the previous owner installed no-hop bars. You can see the small hole drilled into the lower webbing on each side.