Booster pressure question

Hi Gang,
I converted the fronts from drum to disc using SSBC conversion kit for 69 Dart, including a power booster. I put an oversized comp cam in the 340 and am not making enough vacuum pressure at idle to effectively power the booster. The booster works fine as rpm increases. I've heard some anecdotal remedies (reservoir, etc.) and have an email to SSBC tech looking for a solution. Any suggestions?
Author: admin