[dsraven]

second gen would also have a large sway bar and possibly discs on the rear on the trans am. it was the WS6 I think.The WS6 rear disc stuff came on the later '77-81 WS6 Trans Ams or a similar system was used on Caddy Sevilles from about the same time frame. you would need to grab asll the parts from the car so you don't get messed up trying to find some obscure part for the brakes. they had a different style of park brake unit that needs to be set up properly when doing the brake job or it won't work right.
if worried about spring wrap with leaf suspension you could install the old fashioned traction bar or the newer equivalent.