Two separate questions. MC and Disc.
You can buy whatever Dual MC you wish. Boosted or not. As said, they both fit under floor. Whatever one you choose, from what ever vendor, contact them for any insight to what mods will be needed. Also search our archives and the internet to read a bunch of How-to's and get further educated as to the mods if any. It is nice to have boost. It is easy to plumb. Up to you.
The disc kit shown in the Brothers
video includes a spacer. I believe that is to space the stock wheel outwards to clear caliper. Sometimes a little grinding on caliper casting/housing is necessary. No big deal. No pedal change. Search this also.
Expect these kits to move wheel outwards a little.
Can't convert these old trucks sometimes without a little mod here and there. These kits have been installed by thousands of DIY'ers. You are not the first.
