If you're not going to do any heavy hauling your best bet would be a Mustang II IFS (with strut rods) and big GM 11" disks. You can easily add replacement rear springs and shocks, and a bolt in crossmember with SBC mounts (you may not need this since I believe the '58 models came with small blocks as well as the 6). You could also add a bolt in transmission mount.
Results = good ride, power disk brakes, rack & pinion power steering, bolt in small block Chevy and TH-350/400 auto. No hassles trying to mount your cab on a strange frame and no fabrication required to hang the front end sheet metal.
Hack it up if you want to but this is by far the easiest way to go.
<a href="http://www.hotrodsandhemis.com" target="_blank">http://www.hotrodsandhemis.com</a>
[ April 28, 2003: Message edited by: Centerline ]</p>