Hi
I run
dodge50.co.uk and have driven & worked on quite a few MOD spec RB44's (5600kgs) and the civilian / utility S75 4x4 version (7500kgs) and in my opinion the S75 4x4 is better as it has air over hydraulic brakes & better stronger springs & the steering when braking is much better but thats just my opinion.
The research on the website I did quite a few years ago and I do have more into to add to it.
The MOD are releasing all the RB44's they have (excluding the 100+ they buried in Iraq) but lots have been stripped for spares, the one in the opening post has just been bought by someone who will be off overland touring later this year.
There are bad points, parts are getting much harder to source (1 track rod end for example £140 + Vat!!) but they are built very well, chassis are rock solid, I put a production vid on youtube a couple of years ago (in house production, badly made with trashy music, well worth watching).
I have managed to add the full workshop manual and parts manual for the RB44 as well as everything else for the 2wd versions.
One last thing: Yes the dodge 50's were originally based on the american B200 dodge vans but only the cab, everything else was designed in Dunstable (where they were built) the RB44 has the Mk2 dodge 50 cab styling.
If anyone needs more info / parts etc just contact me via the website or owners forum
http://dodge50.aimoo.com.
Regards
Greg