318 running like crap

Hello, 318 1967 Barracuda 4 barrel carb. Was running decent but idling a little rough. Car had sit for 11 years but i had her running pretty good. Then i put in new spark plugs and wires. Ran better. All of a sudden carb started poping. My dad said sounded like timing was off. Tried adjusting timing just by ear by turning distributor thought i had it running better but carb started to pop again. Had carb rebuilt holley now the popong is gone but car is real sluggish and idling rough. Pulled 1 plug to find tdc. Question is should the rotor be point towards 1 at tdc or can it point anywhere also where should i start to re time car from scratch. I guess get a timing gun? Any help please? Thanks