This was my wife's late fathers car, Now hers. I knew nothing about Mustangs until we got this one last fall. My first thought was Wheels. Then I drove the car. Definitely first thing BRAKES!!! So why not upgrade??? I don't know for sure how to go about it the most cost effective manner. I found a 4 lug Disk conversion kit but it wont run my stock 14" steel drum wheels and hub caps. So I'd be looking for wheels RIGHT AWAY $$$$. Scarebird kit I think could be put together for just under $400. but I'm afraid I'll be setting with a bunch of parts that wont go together. Id also Like to add the booster but I saw a kit that included a new brake peddle and I'm not sure why. I'll Bet this has been gone over and over but I have not found this covered anywhere. Here is what I learned, 67 spindles can run and 4 and 5 lug and hubs can be found. GOOD FOR Future when i find a deal on some wheels. Rear Axles from the 7 1/4 dif. can be modified from 4 lug to 5. GOOD FOR Future. BUTT what will get her on the road this summer. I know some will say spend more. Some one will say go through the existing Drums. Please comment if you have a logical direction for me other than 15" wheels and $2500.