Best carburetor and intake manifold for a 273?

Hey everyone! My name is Luis and i am a new guy around here! Back in April i got a 1966 dodge Coronet with a 273 and a 2 bbl. i would like you swap it out with a 4bbl and a new intake manifold to wake it up a little! So... what do you guys think would be the best bang for my buck (i am only 19 and don't have a huge budget)



Sincerely -LuisWB