[mongocanfly]

I'm guessing you mean 2wd instead of 4wd?...with a single front wheel from a dually on a 1/2 t
Like K30 said ..sounds like a lot of custom work...what's the plan ?.
Are you just wanting 8lug rims for the front?...a 2wd dually has a really long extended hub...
Not sure if the a-arms would "bolt on" to a 1/2t chassis...I'm betting not..
The easiest way would be do it from the a-arms out...complete assmebly...
still would need fab work I'm betting..
I doubt the spindles would work on 1/2t a-arms...
And the dually rotors wont fit the 1/2t spindles
never seen anyone do it before
And if the dually a-arms are longer than the 1/2t that may create more issues to swap from a-arms out.
Some back story on what your wanting to accomplish would help...