You'd need a frame rail setup. You have to have a frame to support the rear end and the torque the engine puts out. They are getting quite common and I see alot of different offerings at Car Shows. Current pricing I've seen is $6500 for minimal (and you do alot of work, welding, and fabbing) to over $10,000 with steering, all wheel disc brakes, and ready to slip a 350 into. I know the feeling of liking something you have and feel comfortable with and wanting to make it faster, but for that kind of money and no real alternatives, I'd be stepping up and away from a Celebrity.
Anything is possible with some money in your pocket and access to a mig welder. I saw a Feiro nicely mated to a CJ5 chassis not long ago. Years ago I even saw part of a Safari Station Wagon on top of a 70'* Chevy Van. Talk about sunroofs.......