1973 340 Duster Carb question

AJ/FormS said
IMO
Pull that engine and sell it.
Install 3.23s
Go to the pickapart and grab a 318/904 or 5.2/A500
Forget the Passon.

Except that the engine is original and matches tranny, so i want to keep it that way. Just tune it to be more street than 1/4 track.