check all plugs as you may well have disturbed them when faqffing with the ex manifold. sounds like fuel is reaching themetering head but not getting to the injectors/inlet. is the fuel pump priming? could you have un hooked something when priming the oil pressure and forgot? although it sounds like its a fuel issue (no wet plugs) id also check leads/dizzy/coil connections ect. as its already ran, chances are itll be a silly overlook rather than a terminal meltdown.