318 dodge dart stumbles 5000rpm

Thanks for all the input guys. Very helpful and nice folks on here! Right now I have the stock 2 bbl carter carb. I can get a remain from the local parts store for 191 dollars. Would it be best to go this route or look into a aftermarket carb?

I'm leaning towards this being a fuel issue. Timing is right, if I remember correctly we set it 8 degrees advanced. New air filter, electric fuel pump that is about to be gone. Going to go back to the mechanical hopefully this week. Previous owner installed the electric pump. When I first got the car it had a smaller volume pump, thinking the car was starving for fuel at the higher rpms I installed a much higher flow pump. No help, actaully had negative effects. The new pump was TOO powerful and ended up flooding my engine and thinning the oil so bad the motor started knocking. At least the internals are clean now lol.

Typed this all out on my phone, sorry if it's hard to decipher.