When I bought #142, the decision was much easier. I wanted a car that was as close to the original product of the 60's as could be had. Shelby offered an aluminum car, but their body suppliers (Kimmins, et al) seemed to be a bit unreliable, so it was difficult to pin down a car. Their roller price was also astronomical. When they finally had the good sense to use Kirkham's bodies and frames things began to look up in terms of supply, but the pricing was still in the stratosphere. Then the clouds parted. Kirkham once again started selling to the general public (all of their product was going to Shelby). Wow... Original spec everything. Chassis, suspension, Girling brakes, Lucas wiring, electricals, everything. About as close to to AC Thames Ditton as you could get, if AC at Thames Ditton was still around...
In the 5+ years since I built # 142 a lot has changed. It is undoubtedly now a "better" car, as the Kirkhams have always managed to merge an engineers penchant for best function and quality of construction with the purist's desire for authenticity. A few years ago, they generously offered to upgrade my cars suspension and brakes to the new, more popular billet/Wilwood set up, but I declined, as I like the original cars 60's technology, warts and all. It becomes a true time machine every time I take it out. When you make your choice, remember also that the nature of these cars demand attention - sometimes lots of it - and its helps big time to have a strong, accessible and supportive manufacturer. With a Kirkham, you get that, besides making the acquaintances of some awfully nice people. That aspect continues to enrich my experience, even after these five years of ownership.
Bud