George,
I got a pair of coil-over shocks from Dave Thibeault for my Power Hawk
over ten years ago and they are still doing the job.
I'm sure that they're still available. Also, there's the airshock
solution but they only seem to last a few years.
HTH
JT
here's a wildcard.......
a few years ago I got a "low mileage" (140,000) '57 sedan.....good
overall shape....front end seemed tight,etc........but the front agged,
ride height was wrong all around...even leaned to one side. a quick
look and found it even had those rubber wedge things screwed into the
front coils. so I thought it would take new springs all the way around.
finally got around to working on it and found the previous owner had
taken it to K-Mart for new shocks........of course, they weren't the
right ones. took all the shocks off.....took the wedgies
out.....bounced on it a few times and it leveled right out. put the
correct shocks on and it's straight and at the right height on its 52
year old springs.
I think it would be much less difficult to disassemble and
add a leaf, than to remove those old shackle bushings. I've
done both and adding a 40" leaf will perk up old springs
very nicely.