The arm on my cherry picker is a little longer but I put my motor in with basically the same set up. Where is the interference? If your dolly is hitting the legs of your hoist, just take the wheels off one side and cut a couple inches off. If the K member is hitting your hoist, put a 2x6 under your engine and trans pans. The dolly only needs to be as wide as the tranny pan. Support the lower control arms. There's more than one way to skin this cat. I don't think you need to buy a thing.