Hello guys, Thanks for the Reply MAP. The Delphi 600 box shares only the pitman shaft with the older 700/800 series box. It was a complete redesign. Was that Roush car a "Car of Tomorrow"??? COT cars can only use a Delphi 600 because of sway bar location. 700/800 does not have the clearence to work with these. Busch/Nationwide, Craftsman, Hooter, and ARCA series cars can still use the older boxes if they chose. This is to the best of my knowledge. The 600 box is lighter than the older boxes. Even if it is just a few pounds. A few pounds to a NASCAR team is alot. If you are building a hard core drag car then P/S boxes and pumps shouldn't be on your car. Those guys would use the GM 525 manual gear. This box is meant for the guy who wants the best possible handleing in there car. More for an everyday or a cruizer car. If you have upgraded your front end and are looking to get the best possible handling and have not replaced the old gear, you only went half way. In my opinion your not making all your upgrades, $$$ and time spent in bushings, tubular control arms, sway bar, shocks and springs work to their full potential. This gear will install in 3 hours tops and you can do it in your driveway one weekend. Also, if your worried about your cars originallity being compromised, you just save the old steering gear in you garage. If you sell the car and the next guy wants to put it back in they can. There was no cutting or welding so nothing had to get molested on the chassis. Your idea of using the front end setup from a 4th gen F-body sounds interesting but like a lot of work. I have included a picture of the 600 gear. If anyones has any questions or would like to find where you can order a box, call us at 1-800-790-7244 Mon-Fri 9-5PM.