So, it's a factory BB truck missing its engine? Is it a 4wd truck? How hacked/trashed is the rest of the truck?

As shown by moparmarks, with the right stock valve covers, a 440 will clear the booster, so this may not be a mandatory part.

Any linkage present?

A majority of the wiring is just a matter of extending a few wires.

I'd take a quick inventory at what that parts truck has on it and do a little comparison shopping.

You might be able to sell off/scrap what's left of the parts truck when you're done to offset costs.

If you're buying it JUST for booster and mounts, go aftermarket.