Coil Over front suspension

Has anyone used coil over's in the front of an early A-Body to replace the torsion bars?

Do they work? If so… did you have to re-enforce the shock mount up above?

Here is a link of the parts that I am looking at:
http://www.magnumforce.com/store/de...randID=&Category=&SubCategory=&Search=&Page=2

Thanks for any help you can offer.