Is that 9 hours of 75-85mph on the interstate or 55mph and under on your choice of roads?
I did the uhaul thing to get my 1948 F1 from Denver to Austin (909 mi - about 16 hr nonstop no interstate after Limon, I split it in 2 days).
The thing that pisses me off to no end about Uhaul is they will "upgrade" you to a bigger truck with no warning. So instead of 12mpg in the big guzzler they gave me a "6-8mpg" thing damn near as long as a semi once I hooked up the dolly and truck. And then had the nerve to tell me they changed my pickup location to a place 2 hours across Denver metro traffic (I was on the far east end and they picked a place almost in the mountains past Arvada headed into Golden). They promised me a $100 refund for the inconvenience - never got it. And I spent around $1000 in gas because of the guzzler - Turns out it was closer to 5-6mpg. I knew they big truck was gonna hurt but the big BIG truck was ridiculous. I had put in notice on my storage and lined up all the ducks to go, I had no choice - couldn't tell uhaul to piss off.( I held a Class A back in the day, so the length did not bother me one bit. )
I am ALL for telling someone to develop a plan on their own they are comfortable with and NOT relying on companies or other people. If you have to rent something, rent a dolly, unhook the driveshaft and bale wire it up really well. Never go over 55, watch the gauges like a hawk, go slow and be patient. Pull off after the first hundred miles and check the temp on the side of the tranny, etc etc. Use your smarts and drive smart - don't go 90 cause "it seems to be handling ok", even if it is dark, late, and you just want to be there tonight. Drive for 2 hours, get gas and take a half hour break with it, stop for lunch and have that slice of pie, let the truck rest a few times rather than drive 9 hr straight - take you all day but cost you 1/5th what you end up spending if they "upgrade" you and you have to fill the tank in that monster.
For the record, if you can get the 1500 running, I would tow the ranger with the 1500, or fly there and only drive the 1500, etc - but you know your skill set and know the condition of the 1500 / if you can have a prayer of getting it running.
I would ALSO briefly prepare contingincy plan, take note of how far it is to the next uhaul places if you have to abandon plan A and scramble a new plan. Take a driving buddy who knows the difference between a piston and pissed on. Carry a pretty good set of tools, water, and a gas can (full).