Wheelbase on my TJ was 106" before we pulled it all apart. Shooting for 110" for this build. The Wagoneer was 109" so we know we can handle that size on the TREC courses, and the extra wheelbase helps with smoothing out the whoops. Jesse's buggy is 110" and it climbs well and is stable.
I can double check, but i think from hole to hole it's around 7". I believe WhiteRhino is using an astro box and arm, maybe he'll chime in if he's losing any steering with that one, too. It's even flatter than a Wag arm from the pics I've seen.