My 54 Chevy delivery had a mustang II front end in when I got the car. By the look of it it has been there a long time and the weld in crossmember is set up for the 3 bolt mustang II rack. I've been driving for a couple years now, but the rack has started to leak fluid pretty badly. I've had zero success finding a 3 bolt rack. Will the 2 bolt version fit in it's place? or what does it take to swap it out to a fox body or t-bird rack?
Have you tried Flaming River ? Give them a call. Or, just going to a non-power rack. Your car can't be that heavy. In any case, a second mount location shouldn't be that difficult to build, and weld in place. Well, I guess depending on the cross member design... Mike
Should be posted over on the Off Topic Hot Rods & Customs https://www.jalopyjournal.com/forum/forums/off-topic-hot-rods-customs.98/
The later T-Bird rack has two bolts, and about an inch-and-a-half-ish wider spacing towards the passenger side. If you look at the crossmembers in many of these kits you will see that the mount hole on that side is slotted. This is so they fit original and later T-Bird racks. You should probably convert now, as the original racks are about gone from the world. Sources say that the outer two holes on the 3-bolt rack match the 2-bolt one. You might need to either make a new right side mount, or cleanly cut off and move the current one. Passenger side hole detail: The other side is in the same place, so only one side needs to be modified. You might also need a different u-joint, shaft modifications (cut shorter), and possibly different hoses.
I have a 3 bolt Pinto R&P, outer bolts mount to 2 bolt R&P mounts. Early Pinto evolves in the early years. When the MII showed up the parts were more standardized. No weird funky cable shafts or third mounts.
Stock MII crossmembers accept either 2 or 3 bolt racks, with no issues. I can't speak to the aftermarket crossmembers. I put a MII in my '51 F-1 when I built it back in the mid 90's. (Didn't know any better, and that is just what you did). I used a stock crossmember liberated from a rear-ended MII (you could still find those things in junk yards back in those days, and no one was making crossmember kits for F-1's then). Original rack crapped out sometime in the mid 2000's, and I got a replacement from the local Napa. Went from a 3 bolt mount to a 2 bolt mount. Everything bolted up fine, and been running it ever since.