I don't know if the engine in the Rolls is a pushrod engine or not, but if so, the gasket replacement *should* be quite straightforward. Assuming that the gasket is that engines only ailment, and there is no need for any other machining, then it could be made awesome once again.

If you dad does retire it, what would he want for a sales price? It just *might* by some slim hope be in my price range.