This is the jack that everyone needs for f-bodies, and would probably work well for Corvettes also.
http://www.harborfreight.com/automot...ump-68050.html
I think I've seen it for $109 with a coupon. I unfortunately have the 3 ton low profile jack, it still works well but it has 10 inches less reach and probably wouldn't work nearly as good on a lowered car. Either way it can reach all of the way to the center of the k-member or rear diff.

 

i would try building some. fun little side project just for something to do