U guys r awesome. im new to this scene

glad to see you here.

What did u do for ur fuel system?

12vturd1985... I am doing the same swap. 1st gen in my 85 F350 4x4. I used a dodge NV4500 5 speed adapted to a ford 205 t-case. If you go that route wont need to adapt a ford tranny to the cummins and can use the cummins starter, the ford 205 t-case allowed me to use the stock speedometer cable.
Motor mounts, I used the mounts from autoworld, worked great.
Fuel system, 5/16 hose from lift pump to fuel line thats aready there but will need a return line, I am still working on that. I still have to plumb up a radiator, intercooler, wire the dodge alternator, throttle cable and get new drive shafts made.

Good luck. There is plenty of help here just ask. Cumminsf150 has given lots of good advise

What I have done so far on My 85 F350 4x4

What are you using for the radiator, intercooler?

For wiring up the Dodge alternator, I had to add an external regulator, but I believe the pre-1992 Fords were already externally regulated. Even if you can't use the factory regulator, they shouldn't be but about $20 at any parts store.

I have picked up a super nice intercooler from a 99 superduty, radiator I am not sure yet, I have looked at the dodge which would take guess work out of buying hoses, but have had some suggestions to buy radiator for a 85 ford that had the 6.9 diesel.
Havnt even looked at alternator yet... well maybe for a minute..

Nice find on the intercooler. I've found a few on Craigslist, but havent got around to doing it yet. On my 94, switching from the gas to diesel radiator required changing the core support as well, and I would assume it would be the same for your 85. The diesel radiator is considerably bigger than the gas radiators. The problem with the Dodge radiator would be figuring out a way to get it bolted in.

I dont mind cutting, welding and fabing some brackets to make the dodge radiator work, still scratching my head on this...

well with the 91 dodge radiator al i had to do was cut two holes in the bottom of the core support for the little rubber bushing on the bottom to sit in and then modify the top hold down brakets and welded i little tab to bolt them to. I say get a forst gen dodge radiator.