Will Delco-Remy centrifugal advance springs work in a MP distributor?

Two silver (light) springs and the full 28 degrees of centrifugal seems to be the hot ticket! Static timing of 13 degrees BTDC with the vacuum advance connected, and it would probably like more. No detonation and the MoPower is good, but the secondary air door on my Thermoquad isn't opening as early as I would like it to, and I am wondering if that is because I need more advance or because I need to adjust the carb.

BUT HEY! Isn't that over 40 degrees of total advance? I thought you were supposed to use a max of only about 34. Yet it seems to run well this way.