Hesitation issues - need help

Looks from the picture the vac adv is connected to ported.Try hooking it up to manifold vac.(under front bowl).The idle will be higher ,back it down to normal try setting initial timing(vac. hose disconnected) to 12-14 deg.Also you might have to turn idle mix screws out further to richen it up to make it go in gear without dropping alot of rpm,the richer the less it drops with a perf cam.You cant always set idle mix screws by highest vacuum.