I was impressed by the Deere 5030, too. The numbers look good, the design is very clean, and its sounds are quite impressive. However, I am not aware of any 5030 engines used in automotive applications which spooked me. I would be all ears if somebody does a Deere 5030 & compact pickup swap.
FYI - Regarding the original post, I have seen a JD 414 industrial engine put in an early-80s F250. The owner was pleased as punch when I cocked my head and said, "That doesn't sound like a 6.9...what engine is it?" He popped the hood for me and I saw that it was a tight fit.
Also, I believe that there is a guy running in my area who mated an early-90s F150 with a 4.5 Deere. I believe that engine would be a load for the F150 front suspension but I guess he made it fit. He has a Deere Diesel Power decal on the tailgate.