AVS 2 650 carb sufficient?

On the street with street gears, yes ;
If it spins both tires all the way thru First gear, then it's probably too big.
If it don't spin the tires in Second gear, then you won't get to shift-rpm until maybe over 80 mph.
With 3.23s say; 65= ~4200 in Second at WOT so then, in that situation, you wouldn't even use all of a 500.

But if it was mine, I'd put a Thermoquad on her and let her howl. I love that sound. I put one on my winter-engine, a stock, low-compression 318, with an A904 and 2.76 gears, and a 2800 TC. Man; I swear that thing sounded like a Chevy truck, the R's jumped to 2800 off the line, and it was still doin' 2800 all the way to like 80 mph thru the shifts and all, moaning for like three and a half minutes lol. I loved that combo.