Longtubes can be a challenge with the transmission crossmember but at least you're not 4wd.
The Saginaw pumps don't grind and whir like the C2 style do.
They also don't squirt out the cap vent if you turn the wheels with the engine off.
Those with lifted trucks and wide tires say the van pumps hold up much better.
I don't think they have the relief valve set any higher.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.