Cub Cadet Model 70

I found two cub cadet lawn tractors, the one I'm looking at right now is a "70" I believe it a early 60's model. I do custom paint work on bike and cars and love old stuff. I own a 70's style motorcycle and a 64' Impala the old lawn mower would look good in the driveway. Here my question, the model 70 need rings put in the motor. I can get it for $100.00, Then it will be a mild restoration to get it like new. Is this thing worth the money to put this kind of time into? Thanks