97 powerstroke into a 91 truck??? what can i expect

[shawnsack]

ok so heres what i got. i have a very rotted out 97 e350 2wd diesel that i want to pull the motor and put into my 91 f250 4wd 460. i want to use the motor and trans from the 97 and the transfercase from the 91. is that possible? is there some kind of an adapter i need? ive done some searching on the subject but cant get any definate answers. like some people have told its a fairly easy swap and some have told me its really hard. im not worried about difficulty i just dont like big supprises. so if anyone could give me some info that would be great. thanks guys

[shawnsack]

noone has ever done this?

[atvfreestylekid]

I believe the output shafts are different on a 2wd and 4wd.

[ryandamo]

Im pretty sure ive heard of it being done,, you have to remember tho that there are many annoying stupid differences with the truck. First, you will ave to use the rear axle from the 97 since the 91 get the speed info from a cable attached to tranny instead of a speed sensor. Also the firewalls are different as well as the rad support so you will have to figure something out with the rad cradle as well as the firewall. also not sure how easy the dash will be to hook up, speedometer is a definite no, but if you can get the interior from the 97 to fit then that would be best. If you can have both truck being down for a while id say go for it, but be ready for small prblems, hopefully you have a junkyard near by incase something arises

[Camostroke]

If you've got time and patience it can be done. The wiring harnesses will have to be interchanged considering the 97 engine is drive by wire. As far as the 7.3 bolting up to the same mounts as the 460 you should be alright. I know for a fact that the 7.3L powerstroke will bolt up where a 7.3L idi engine was, I have done this swap myself. As far as the trans and transfer case what kind of trans is in the van? I would assume your tcase is a borg-warner 1356 which usually bolts up to most trans.