suspension question

[Nohair]

Howdy! after exchanging thoughts on another site I have a question about the rear use of coilovers in place of the torqsion bars - If you use a system of bars (like the set up on the opening page) is there a chance that the orginal towers will break off or the bolt hole go out of shape and split?
I reall think that the coilover would be very easy to tune compared to the bar system
thanks for your time
nohair