I am planning on building a one off car and am most of the may through designing it. To finish the design I would like to find informtaion on things like where exactly the bolts are on some independent differentials so I know how far up or down the back of the frame needs to be to hold it. I havn't chosen a differential yet but would probably want to go with one based on a Ford 9 in. I quess I am looking for a site that has smaller information like dimensions of differentials, shocks... before I have to buy them to see what will fit and what won't.