EASY DISC BRAKE CONVERSION FOR 5X 4"

I would love to have that Information also [email protected]. I would like to covert the Cuda to disc but keep the small bolt pattern, I know the Swinger needs a complete brake rebuild and from what I gather the 4 piston calipers are hard to get parts for and very expensive. Is that the stock set up on a 70 Swinger? I have not begun to investigate this yet.
Thanks