S&W makes a rearframe kit and offers a ladderbar kit for the H-body , you can keep the factory wheelwells if you choose as there is minimal cutting of the floor to install this kit , you can get it in either rectangle tubing or roundtube if you ask , there used to be images of this kit being installed on the other H-body site 4doorjoe did the install on his 76/77 vega hatch many yrs back , it,s a real clean install as well .
as for SWTRacing , Andrew moved back east Virgina,Kentucky or another state in that area and i beleive he got promoted with his job as well so he,s been really busy the last several months , we chatted a while back on another site
and if your suspension mounts are solid and rust free and the car is in really good condition i,d convert the car over to a torquearm set-up , this is a very proven design with dragracing , lots of guys in the camaros/firebirds running deep into the 7,s in the 1/4 mile and high 4,s in the 1/8 with 60ft times in the highteens to 1.20,s granted they are running a 325/315/295 tire . and there are cars running mid 5,s in the 1/8 on a 26x8.5 slick with stock suspension be it leafsprings or 4 link or torque arm , they all do it with a modified stock varation of the factory suspension .