The 3b is a love/hate style....but they have fairly strong running gear for the vintage.....
Although the rear diff is a dana44, it's 2 peice and has tapered shafts.....But ip them out and drop in a set of patrl diffs
I'd yank that motor out an look at an EFI falcon motor instead.
New set of seats and redo the rollcage....
What a top little toy...