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FWIW The Mustang II front suspension isn't the best from a geometry perspective for optimized handling. Sure, it's an A-arm layout but was designed back in the 70's to do a decent job and be inexpensive to mass produce. It's a parallel unequal length layout that doesn't provide very good camber gain and lots of in/out scrub. OK for a hot-rod but not the best if you're wanting "sports car" handling. However, it's still relatively inexpensive with lots of aftermarket versions available - I'm fitting a version of it to my fiberglass body (tube chassis) buggy. I'm going to alter the geometry a little and with the limited suspension travel it shouldn't be too bad. Ideally, you'd lengthen the a-arms (from the stock geometry) and re-work the pick-up points but I don't have room in the buggy for longer arms. Also the spindles aren't really that ideal either, pick-up points require mounting the spindle high (relative to the chassis) - the axle is very low on the spindle. When you start really working the parts for improved geometry you eventually find you'd be better off just starting with a better spindle to start with and working in from there!
I've read ATS is (or will be at some point) coming out with an improved version of the M-II spindle, but that may be quite some time from now...
On the plus side, it was designed to carry the weight of a V8 so the bearings and ball joints are quite a bit beefier than VW (but not "too massive") - great from a performance perspective. Also, with the Chassis Shop/Wilwood brakes the spindle/brake/hub package is significantly lighter than standard VW items even with a bigger rotor size! Built-in domestic bolt pattern comes with the package.
Jeff
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