And since the ratios are fairly wide, they are more suited to low rpm useage. The A230 fully synchronized (side-cover) is the only 3spd worth contemplating if you have a v8. And then only with a lo-performance set-up or a cam with a short period and a very wide LDA, such as any oem cam.
The top-loaders (A745, A903) are not strong enough for anything but stock type useage, and as far as I have seen, none had 1st gear synchros, so that makes downshifting into first tricky and sloow. And the clutch-departure has to be adequate to allow a neutral to first clean engagement at a stop.As for me, I wouldn't allocate shopspace to store one of these, unless perhaps if it was pristine.