Most RV dealers will not know or care about recalls for the chassis since that has to be handled by the chassis manufacturer..... Ford in this case.
Only the BIM /BIR would be related to Thor and it sounds like it is not needed on this coach.
I don't think you need to worry about the switch from the V10 to the V8 in a 22' Class C. Given pasat experience I personally would not purchase a Class C over 25' because the length, hieght and weight start pushing the capabilities of the stock Ford Suspension for the E-Series. But for a 22' Class the new V8 would not bother me at all.
It would also not bother me about recalls on the chassis. Automobiles have recalls all the time. I purchased a 2020 Magnitude Super C 18 months ago on a 2019 F-550. I have had a couple minor recalls on it that Ford has handled.
There may be other who can comment on their experience with the new V8.
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