I hope it will hold up I plan on adding hydro boost brakes to my truck soon. I allready have all the parts just have not installed them yet. I am allready running the ram assist. I upgraded to saginaw pump from a 74 Mark V, but I also added a 19,000lb GVW B&M trans cooler to my power steering setup and extended the filler neck a few inches on my pump.
I know it does not answer your question but I think there are a few ppl on here that are running all 3 from there pump, but I am sure it will be a Sag. pump.
Mike