Kurt,
If you are an experienced fabricator (which I am sure you are) you can easily make your own A-frames to whatever length you need for your tire track. You can buy ball joints and ball joint holders from Speeway Speedway Motors - Street Rod Parts, Race Parts, Ford Flathead Parts, Sprint and Midget Racing Parts, Pedal Car Parts, very inexpensively. In fact they have a full line of MII parts for fabrication. Just remember to make sure align the pivots point of what ever rack use use to intersect the line between the inner lower and upper A-arm bushing and you should eliminated bumps steer. It is really quite simple to fab up the whole systm even if you have never done it before. Just think about tellling everyone that you "designed and built" your own front suspension.

Dave is correct about using a strut type OEM setup. I have used Datsun struts (which take a chevy wheel bearing by the way), taking the stock spring perch off and mounting a standard coilover spirng and adjuster on the barrel of the strut. Makes a very light weight and clean setup. Some guys use a Mustang strut but it is a bolt together spindle setup which is a little bulky for my taste.
John