Building Rollbar

[Bino]

Hey all,
I've got a '71 K5, and with summer upon us... the top needs to come off, and a rollbar needs to go in. I'd like to build it to the same specs as one of the dealer installed units. Would somebody mind providing me with some basic dimensions on one of these bad boys... overall width across the bottom, hole spacing on bolt-down plates, tube diameter, height at which rear down tube attaches to main hoop, distance up fender well (from floor) where down tube plate mounts to fender well... etc.

Also, anybody know of a 3.42 gearset for a Dana 44? I found one company but they discontinued them. Otherwise... I'm dropping off a 10-bolt for a full rebuild tomorrow afternoon.

Much Thanks