I have done it to a Tiger 40. I used a Sullivan tailwheel assembly and a set of formed aluminum mains, both from my LHS. I had to mount a hardwood block inside the fuse forward of the center of gravity for the main gear. The Sullivan assembly mounted to the plywood bottom of the fuse without modification. The taliwheel assembly has a spring linkage to the rudder. Be sure to check the balance.

My Tiger works well as a taildragger. I find that taildraggers are easier to handle on a grass field.