69 c10 brake booster help

[blosmde]

Hey guys need some helpful advice from the experts. After much internet searching including here I need some help with brake booster for a drum / drum setup. I know I want to keep my old girl drum / drum setup. I currently have a dual mc only which is suspect at best. I want to put a new dual mc, booster and bracket kit. My question is will a 9 inch single booster work well or should I go 7 or 8 inch dual? Will a 7 or 8 inch dual be too touchy? Will a 9 inch single work good enough? I know 11 inch single came with our trucks option but finding an 11 inch single, dual mc and bracket kit is not easy from my searches, plus Im not crazy about the 11 inch look.