John, I've changed everything over to the A12 carb, & it's still doing it (stalling, that is). I think the problem might be with the distributor, as it seems it might be stuffed. To get total advance, you have to set it to 15 degrees inital advance, & it advances very slowly. Seems it's graphed for a big cam & webers. I'm waiting for an electronic dizzy kit from Chris Lyons. I'm hoping it doesn't like the amount of advance & stalls. If this doesn't work, I'll just put up with it & get the A15 rebuilt as soon as possible. Thanks for the advice,
the float level was the first thing I checked & it's right in the middle of the dot.