What engine is in that motorhome???

So I asked Gramps again about the motorhome. Apparently, there's already a plan in the next year for my uncles to come out and tear apart the motorhome. At best, I'd split the bill for taking the bits to the dump. He has no problem with me just taking the engine, as he puts it, "one less thing on it to deal with!". He just doesn't want the thing torn into until they're all ready to come and dismantle it, but I can wait.