[767Jockey]

OK,I just measured it all up, here's what I have and why I chose these measurements:
Bar is custom made by Speedway engineering. 3/4" diameter.

Centerline of bar to bottom surface of flat lateral rear crossmember is 12 1/2"
I didn't mount it higher because the drivers side arm has to fit beneath the outer mount for the rollbar. If it sits higher it'll slap the underneath of the rollbar mount when the arm comes up. I don't know if you can see in the pictures, but I had to do some trimming on the underside of the rollbar mount to allow clearance for the driver side arm to swing up without contacting the lower side of the rollbar mount.

The arms are adjustable from 6" to 8" measured from the centerline of the bar to the centerline of the down link.

The bar is 34 1/4" from arm center to arm center. This drops the downlinks right into the center of the lower control arm mounts.

Hope this helps.