Wally went to about 55/45 after the latest round of mods, but that's with the spare tire (about 150# with the mount) hanging on the back. Of course if the tire wasn't there my tools would be so it's probably fairly accurate. The cool thing is I lost a lot of sprung weight off the front and I could really feel it on the one higher speed rough road section I drove on the UA, the front wasn't hitting near as hard as before.
The changes that would be relavent are:
front axle moved forward 6-7"
alum. heads and water pump plus lightweight rotating assembly in motor
switch to full hydro steering so I lost the box and a lot of locating and steering linkage off the front of the chassis in exchange for a valve mounted on the firewall.
That's really about all that was relavent weight wise, the rest is all comfort stuff.
I imagine if this had a alum head small block that it would be very evenly balanced and a lot of fun to go fast in. And with the weight of a Dynatrac/Dedenbear hydro steer D60, if you tie the axle to the chassis it would still be a good climber.