I would skip all the work and just throw the duals on the srw axle, a set of D***e flippy mirrors and roolll.
It'll be a smidge wide!!
The main housings are the same drw to srw but everything backing plate out needs swapping if done correctly, possibly the axles too depending on the next bit cause .... Now be warned that there is 2 different widths of dually, standard dually and can and chassis. C&C has the narrowest tire width.
I'd link Bill Vista's 14b bible but I'm on by itard ATM.
What are you finding for srw 60 front hub prices?