383 runs like a giant turd WTF

So i have a 383 built to stock 70 specs with a mopar 509 cam and edle tourqer intake. I cannot for the life of me get this car to run good it idles great no burbles nothing smooth as can be crisp response running 750 dp. I checked the cam timeing its good, checked comp it was 140psi across the board. I even tried a 2 differnt carbs and same thing.

I talked to one guy and he said that the 509 sucks in a 383 now i could see it not working as well as some other cams but i not jokeing, a good running caravan could give this car a run for its $$$

car is around 3300lbs
4speed
3.55 gears