Doesn't look like that applies to E-series vans; the lemon law in Ca should but I've never researched it.
I've had some problems with my engine but most has had to do with the dealership working on the engine and some my fault. I've yet to loose a turbo like others have. The turbo seemed to be the #1 problem on the 6.0 from what I had read from members here but still, there were a bunch of these engines stuck in SMB vans that didn't have problems.
Some issues I have had or noticed:
>Turbo problems with early years and vehicles that sit. I use my 06 as a daily to weekly driver. Still others had problems with their turbochargers who went through several of them even when the vehicle was used on a regular basis...just didn't seem like it was that common of an issue where multiple turbos were replaced.
>Short drive times w/o letting the engine make it to full operating temps.
>Injector and EGR problems. I had both until I started using fuel additives. One problem was that a oil sample to the lab came back showing an injector ready to let loose. Ford wouldn't take the lab report and it took a tow to get them to do anything.
>A variety of sensor problems. I was towed for a failing HPOP sensor myself, but I don't hear much from others on this. The cam sensor seemed to be an issue with the 7.3.
>Bed plate gasket. Just a poor design by Ford.
>Over tuning the engine and/or not monitoring EGT's on hard grades. If I get too hot I pull over and let things cool down.
>Over idling. I did this and it did cause problems with the EGR. I now only idle enough to so I don't run hard on a cold engine and I also let the turbo cool off before shut down.
>I did loose a fuel regulator and vac booster the latter costing me a tow.
All the other problems have been non Ford issues as far as design goes. SMB wire harness took out a radiator, and last year I had a screwdriver do the same. Had Ford not tighten a heater hose clamp that ended in a tow. Had a bad electrical problem that was resolved.
I think of myself as one who has had several engine issues but getting a lawyer involved would be my very very last resort IMO, especially considering the conversion. JMO. Is it a lemon? I don't think so. Temperamental yes but I feel I’m just getting the bugs out
From My point of view, I suggest an extended warrantee, a couple tow services, and a savings account to cover bullet proofing the engine once the warrantee is up.