Hi Iam doing a swap now as weather permits 1990 E250 coachmen van camper with a 5.8 gas engine that has been taken out and a 1991 E350 with a 7.3 diesel that I have just removed. So far taking out the 7.3 was a job from H*** and on the camper the 5.8 came out with no problem. And so far I have noticed that the core support is a little different no problem fixing that. But the fire wall opening is a little different that the diesel came out of. Looks like about 2+ inches wider on the opening Iam going to cut and rework mine in the camper van. Also the complete wiring harness has to be changed out swaped over. Iam have done with that. Iam going to regasket and new seals in diesel before it goes back in. As for the 460 mounts no idea but the 5.8 and diesel mounts are different Iam working on it as weather permits out side van camper is to tall to fit in garage Its a 4x4