Edelbrock Thunder 650 AVS

I'd definitely stay away from the afb type 1405 or 1406 carbs. I've had several over the years a,d never was too impressed with them. The avs seems to be a major improvement. If the extra money is an issue, buy a reman from summit. Looks like new, ru,s perfect and still has a warranty for about the price of a new 1400 series.power starts right away, and significant gain in fuel mileage