SLANT 6 timing issues , In need of a Mechanic , los Angeles Area!

Firing order is determined at the distributor cap (basically). The timing chain will determine valve timing. Anyway, check your distributor before you start tearing into the engine.View attachment 1715115095

Ok i see what you guys are saying , My car is 67 dodge dart , i got it from the second owner. At the time of purchase , the engine was smoking like a train lol. I drove the car about 30 miles and everything ran fine. But like i said the engine was smoking bad , so i had it rebuilt . After the rebuilt , we installed the engine back in the dart . I did Input that exact firing order and the first issue that came up was low spark. So then the engine did not want to crank order or start. So i ended up finding an mechanic that used to work on old cars. He told me " i bet i can make your car run " , so i said "ok, do what ever it takes" . He ended up taking my distributor one night and came the next morning. HE said " i Modified your distributor". So we installed the distributor back in and it fired right up !!! What how ?! I still have NO clue what he did to it. The Dart Runs and Drives now BUT i Feel like something is still not right with it , i feel like the car has no Power and Sputter a lot .When i try to hit the gas hard , the dart just dies . I'm thinking maybe my carburetor is going bad. The next step is buying a new carburetor and if the dart does not run smooth after that , i have not clue what to do next.