[SkinnyG]

For future reference: you can fit a 73-87 crossmember into a 60-62 frame, but only the top rear bolts on the sides will line up, and only the front two (four) bolts on the bottom of the frame will line up.

So I'm making a drilling jig that will reference two of the existing '61 holes, and provide a pilot hole guide for the '84 holes, moving the crossmember forward 3/4". This movement, coupled with moving the lower control arms 3/4", should position the wheels about 1" to 1-1/8" forward in the fender. The control arms are moved forward for more caster, which works -wonderfully- on my '77 Silverado, but really only moves the wheels forward about 3/8" of an inch because of where the spindle sits.








The bottom two holes don't quite line up with anything useful.