That whole mess back there should have got several someone's reprimanded or fired. To be fair it was a REALLY quarter-arse setup that was quickly implemented to delete the air ride because the cost to install it on trucks that were (at the time) going to have the cabs upgraded to armor did not make sense. I spent like a year messing around with it. Mine never hit the spare crane but had MANY other issues - primarily the whole cab would shift like 1" to the left when the pin engaged the latch. I actually got a new bracket - which according to the TM had a revised part number. I was SO convinced they must have changed the dimensions....
Nope! Same $hit. I ended up doing multiple shim revisions of the whole mess. The latch had to be angled up in the front, and the latch bracket had to leveled left to right.
Every one was different is what I came to the realization of. The tolerance stack up between all the parts is obscene and so your only choice is to iteratively zero in on each truck's unique problems and address them.
Sorry I don't have a magic bullet on it. It's royally F'd and I wish it wasn't. FWIW mine has about 3/4" between the latch pin triangular plate and the crane. And that's pretty much immovable. You may have better luck moving the crane back a little.
. Mine does the shift to the right though. I do want, and plan, to replace the front cab mounts and have the new bushing I bought from you back before picking the truck up in Maryland, and have had stainless steel washers and bushing made since mine all very corroded. Unfortunately, at the right front mount, the the bolt and bushing have become one and I have been unable to remove the bolt. During the process of the engine restoration and bombproofing I did, I was soaking the bolts/bushing with penetrating oil hoping to loosen things up, but no love. I have worked the head of the bolt with an air hammer hoping the vibration would loosen it up, no love. Tried the air hammer with a chisel bit under the bolt head hoping it would lift it out, no love. Since I have the factory winch, the right side body mount bracket is also part of the roller fairlead so there is no access to the bottom of the bolt to drive it out.