What they said. Tubs cost about $150 but labor will eat up the vast majority of the expense. If you do it yourself they are not technically difficult to install, just time consuming. There are a lot of threads on here and Pro-Touring.com showing the step by step process. Keep this in mind however, when you install the tubs you notch the frame rails and this may cause flexing if you keep leaf springs. With a 4 link such as Ridetech this frame notch is not an issue as the load is supported by a weld in saddle.
http://www.ridetech.com/store/1967-1...rd-airbar.html