[Ross F-1]

I have the Innovate unit linked above, it is very interesting to watch how the carb responds under different conditions.

You have to weld a bung on the exhaust, preferably up near the manifold. Hook up power and a thick cable between the O2 sensor and the display head. Can be hooked up to a laptop to capture data while driving (see below). I'd say you could switch it between cars in less that half an hour.