500 AVS2 or 650 AVS2 ???

Every body has there own opinion. Sounds like you may be a cruiser and not a full throttle guy.
From my own thoughts I favor the 500 for a street use car because of better throttle response
and drive ability. I played the carb game and used a 500 on a 451 stroker for Power Tour .
The car had OD and I got a real 20 MPG during a 5,000 mile round trip. Now I will admit
that I have a AFB 600 on my 318 car now.Reason is I had it sitting on the shelf. If buying new it would be a 500.
My 2 cents.