Pricing kit options and trying to establish a budget for the build. Wilwoods look sweet but are kind of expensive. Reading older posts, I'm not convinced they are necessary for street driving and occasional autox. I can find an entire rear end with 10-20k miles from a donor stang for $700-800 (shipping extra)

example:https://www.ebay.com/itm/2015-2016-2...Vanq93&vxp=mtr

Would like some feedback from anyone that's used the 13" rear brakes and anyone that's purchased an entire IRS/Brake system used. Would you do it again? are there any surprises that I maybe I haven't considered? Was is cost effective using donor parts rather than buy new from FFR?