I’ve seen those conversions in person, Thaler also makes one and while they are cute and fun I always felt they should have been a factory option or an AEV tie up.
They do make for a very tight cab but honestly so did the CJ8 and the CJ3/5 single hard cab.
As for building up the D30 axle that far, no. Just a whole box of Nope! For all the money spent they couldn’t just make some 44’s happen? I’m not saying 60’s are the way but at least a 44. But if you never wheel it does it matter? It will likely sit in a beach house garage somewhere and come out a few times a year to cruise the strip, look flash and then go home.