There are parts available to lower anything. The front is easy - springs and shocks and spindles and air bags. Leaf or coil in the rear? Either one can get dropped and c-notched or bagged or all of the above.
5, 6, or 8 lug? Disc or drum brakes?
Look at the Early Classic Enterprises or Classic Perfomance websites (
www.earlyclassic.com or
www.classicperform.com).
Don't heat your coils - ruins them and your tires and your ball joints and, and, and,....
Good luck, Scott