how hard would it be to use a set of fenders, grill, hood and hedlights from a 92-97 ford on my 91 f350?

94cummins12v's Sig:

96 f350 crew cab 12v cummins,nv4500 , 271 dhd tcase,E/F shift handle w 2low and pacbreak switch, 4" straight pipe Dual 5" bullhauler stacks, Industrial injection 370 injectors and super phat shaft 62/71/14, #100 fuel plate, 4k GSK, ARP studs,60lb valve springs,custom 191 dv's, timing 16.5*,13" ceramic valair 6sp clutch, AFE intake dana 80 rear dana 60 front 472hp-1027tq

Those would probably be a bolt on for a 91, cant say for sure though. On the 80-86 trucks you need to swap core support too.

Hyde's Sig:

1983 Ford F-250, Power by International Harvester! Straight pipes, custom air filter, 4500 gov spring, gauges and whatnot. On the hunt... 97 F-350 cc/lb Powerstroke

well when i do the conversion i could always fab differnt brackets to make them work couldnt i?

If you had the core support, it is a bolt on deal. I used a 95 front clip on my 85 truck. If you dont swap the core support, I think you may just have to do a lot of drilling and measureing to get the header panel located properly. There's also a good chance half the holes you need are already there. I've done a lot of parts swapping between the 80-96 fords and was usually surprised how little difference there was in the way things mounted up.

Sycostang67's Sig:

1993 F-250HD SC XLT Lariat 4X4 7.3/ZF5spd ATS WG Turbo @ 12psi, 3" DP 4" straight exhaust, 5" stacks, Hypermax cowl induction, IP up 3 flats, typ4 BB injectors, GPR LED mod, Pyro/Boost guages 186hp/363tq

oh ok sweet deal i basically need the entire front clip for the truck im using my cummins radiator and intercooler

I was reading up on the cummins into a ford, and the 92-96 front end is the best one to use. It has more room in the front for an intercooler.

sweet deal i just like the looks of the 92-91 better than the pre 92