CHRIS67GMC built an awesome truck using the stuff Rob from NoLimit designed. I'm not sure of the cost but if you're looking at the TVS stuff ...
Here's Chris build (he's a member on here and a dealer for NoLimit I believe)
http://67-72chevytrucks.com/vboard/s...d.php?t=521095
Rob designed all this stuff and is also a member on here. You can buy from him also.
http://www.nolimitengineering.com/
I can only drool (and dream) of using this stuff ...