[bigblockv6]

The Rochester 2G is a better carb than the ww but you won't see any kind of improvement in performance it will be the same as the stock ww carb. Overall with the Holley 500 there is a dramatic increase in performance despite what you've heard that this carb is for wide open throttle applications, that's not quite true. Another carb to consider is the larger Rochester 2GC used in 70's GM 400 plus cubic inch engines as well as Buicks 231 V6 from 1975-78, this will require an adapter as well and is in the 425 cfm range.