the-486 wrote: ..............My task at hand to to repower a 1969 Ford e200 campervan, with a diesel...........................
Well, let's see if I can help you...
I did install a 33T in an '85 E-150 using a special tranny adapter that was available back in the early '80s, it required some fabrication around the dog house and floor to clear the SAE #4 housing on the Diesel. I used a Ford top loader 4 speed trans for a while, and then I ran across a T5 from a Mustang, purchased yet another
adapter, look here , made a few changes to the drive shaft and such, and gained an OD gear.
The rear end ratio I had "3.08" was a bit high, so I swapped it with a 4.10.
There are better adapters available today to match industrial engines to automotive transmissions,
LOOK HERE "lookout for front cross member interference with the oil pan"

overall it was a great van to travel with, I pulled a 20' pop up camper all the time going down to the Keys

, millage was about 25 mpg. 3" straight pipe and twin fuel tanks, OH and that Turbo sound......
Hope those links help.
Dslsmoke