5.4 to 7.3 conversion

[mr.fatboy82]

ok guys at the title says...im new to the site..i tried searching to no luck...i have a 03 cclb 4x4 5.4 ..i get about 9 mpg..i found a 2000 e350 with the 7.3 it has 140k.. it is a duallie and 2wd..i will have whole vehicle..will the tranny work with my transfer case?? also all the wiring and motor mounts...how much more and i gonna need and how much of a pain is this gonna be?? need answers asap...lookin to buy the e350 this weekend..also im gonna get this e350 for a steal..

[mr.fatboy82]

or would i be better off waiting to find a f250 4x4 with the psd for the swap..

[mr.fatboy82]

i can also find a 4x4 tranny from a 02 f250 for 1300 from a salvage yard

[TSbeanspowerstroke]

it should work with your transfer case, since you have the superduty it should be the same transfer case as the other engine models, please correct me if i am wrong as im not 100% sure. idk about all the wiring and motor mounts but i think this might be A LOT of work. i would honestly wait to get an f250 with a psd in it. and if you do get a f250 with a psd would you still swap motors even if the psd body was in good shape?

[Matthews]

The 2wd transmission will not work with your transfer case.

[mr.fatboy82]

i should also say that the f250 cclb that i just bought is in mint condition..no rust anywhere.. if i have everything from the e350 ambulance and the 4wd tranny..diff motor mounts..what all else wont work?? im not understanding y it wont just be a reg swap..if i can put a 12v cummins in the stupid thing than i can put a 7.3 in it.. what all other major problems will there be??

[mr.fatboy82]

i love this truck..got a great deal on it..but i really want a diesel and way better fuel mileage... really looking for positive answers please..want to get this e350 asap...guy says i can get whole truck for 1300 but it needs a fuel pump

[atvrider93]

The firewall is different and probably won't swap from the van. Stuff in the dash is different. The reason the 12v is so easy is that it's a mechanical motor, doesn't have all the electronics the 7.3 has.

Personally I would buy the van, part it out, and sell the truck. Then find a 4x4 psd that you like

[loubrock72]

the van engine is configured differently than the truck. different turbo, no y pipe on van 7.3 for intercooler, a/c and alternator brackets are different, different ecu. hope you are good with ebay! just a couple things to think about.

[Jakeman711]

The 7.3 long blocks from a super duty and van are the same, but that is about it. As said before the accessory brackets are different, the up pipes and turbos are different. The wiring harness and PCM are different too. You can use the van turbo though, just need a set of bellowed up pipes for a 99.5 and up super duty and a van turbo exhaust adapter. The turbos are the same except the van turbo does not have a waste gate, and a larger turbine housing. I run a van turbo on my truck and love it. I would think the motor mounts are different as well. I know that you bought the truck and it is in nice shape, but it is going to cost quite a bit to put a 7.3 in your truck. You will need to change the cluster, and harness behind the dash too. It might be more cost effective to find a P-pump Cummins to put in your truck. I know you wanted positive, and anything is possible, but it is going to cost a lot of coin.