Floaters/Ladder Bars on A body

i used something very simular to that back when i was bracket racing. i used the stock springs that came on the 66 cuda with it and it worked great. hotrod hooked up very well every time. took me to a few track championships places.
are the mono leaf springs steel or fiberglass?
for the small sum of $100 for the floaters i'd sure recommend using the set up. if you deside to step up to a coil-over you really haven't lost any thing. the coil-overs, mounts top and bottom and diagonal bar is going to set you back $1000 so why not go for the floaters now.