You'll get lots of opinions. Mine is that it's a COMPLETE waste of time and money. The torsion bar suspension is superior in ride to anything else out there. Go drive a restored example of each and let me know how they do. The only reason to switch out is to get disc brake kits to fit easier. And that is also a waste of time and money in my opinion. You can get great results from high quality brake shoes and proper repair of the brake system.
Some components from torsion bar systems are more expensive that coil spring frontend counterparts. But those parts are still less money that throwing out the whole system and replacing it with another.
You could always go and buy a '63 if it makes you feel better. Anyway, that's just my opinion. There will be others.

Last edited by k10; 08/13/2011 10:45 PM.