Had the problem of mud-flaps getting ripped off when 4WD-ing? I know I have. Cool idea is to trim the bottoms off the flaps - you can remove nearly three inches off the bottom of each flap and if you do it neatly it looks fine. They still work too - as mud-flaps and it reduces the likelihood of them being removed for you.
If you insist on a factory look however, the early model 80 mud flaps were shorter than the '93 onwards.