Nifty! Some time back, I started planning for a scale hot rod project. I debated using a wheelbarrow tub, and may still if I can find one for a good price. I am not going to drop $150 for a new one...
I, too, had planned for a front engine, RWD setup. But instead, I was planning on using a 6.5 clone. The power train may consist of a shaft drive, but I have hit a bit of a stumbling block. I had an FNR gearbox from an old lawn tractor that I had intended to use for this purpose, but I needed it as a bargaining chip. I ultimately traded that box for the Peerless 700 tranny I needed for my race mower build... That's okay- the Hot Rod is waaay down the priority list.
Meantime, I am watching your build for developments! LOL
You may want to consider making those front suspension arms longer.