340 Stroker (372) carb recommendation

No argument there! A properly tuned 3310 would be as good as anything else on that, too. For a 367 with ported X heads and LD340 with your preference for an electric choke, vacuum secondary Holley, any Holley between 750 and 830 CFM is going to be in the sweet spot. With 3.23 gears and the tight converter, a 750 to 780 looks good.