In the mid 1960's most Chevelle's with a posi and any sort of power had wheel hop. These ladder bars were a popular solution to that problem and work great to keep things planted. I think they look great too.
There seems to be a lot of more elegant talk about Instant Center and such in the last 10 years that I ever recall in the past. There are different height no-hop brackets to adjust the upper control arms and they also have kits to change the position of the lower control arm mounting on the rear housing. None of which is terribly cool in a Day 2 kind of way, but I'm sure offer a better ride quality and probably help you hook better when you're headed into the 9's.
These guys made tons of bars and got them to work.
I've never run them, but there are 2 sets of the Ansen bars on ebay for another Day 2 solution, but I don't think they would look as cool as the ladder bars.
http://www.ebay.com/itm/Ansen-Ground-Gra...9b9&vxp=mtr