Well, they're asking $250K for this bad boy! 1933 Rolls-Royce Phantom II - $249,500 - Vehicle Classifieds For Classic Phantom IIs For Sale (CC-360785)

Granted there's a lot of difference between the two cars, but it seems to me the RR is more of a "purist" car that doesn't fit somehow with rat rod (or any "rod" for that matter.)

If it were me and I was going to cut her at all, I'd be inclined to go with Pat's suggestion and make it look bone-daddy stock and put a nice BBC in between those frame rails. would take a ton of work and would probably be easier to buy a wrecked late model Corvette and graft the RR onto the frame. If the RR engine does run well you could probably sell it and recover a lot of the "remodel" cost!!

My two cents!
Glenn