How have I not seen this one ?? Very KOOL !! Don't take offense, but my first thought upon seeing your build was - Munster Coach ! Love the look.. had to go back to the start and see it all.
I know this has been covered already but you may be headed for trouble with the way the front axle is bolted thru to the trailing arms. Not only from suspension flex, but when braking. I've used this exact same axle before in a build on an open wheel car, though drilled for a conventional perch bolt like early Fords. If you watch the axle when stepping on the brakes, even just a low speed stop, you can see the axle actually twists from the force the brakes apply to it. My point is that there are tremendous twisting forces applied to the axle, especially when braking, and such a narrow mounting point on each side looks dangerous to me. Don't want to rain on your parade, just my 2 cents worth.
Keep the pics coming!