No one ever wants to hear this... the Weber series of 2 bbls, with the tiny 32mm primary, are almost ideal for smallish inlines, maybe unless it's heavily modded for high flow and high revs.
Easier to tune and setup than the Edelbrock and Carter carbs too. Don't let association with 'import scene' make you over look them. $400 new. You can change idle and primary jets with a screwdriver with the carb on the engine. No gaskets below the waterline. No stupid power valves.
You can have performance and mileage both.
The little primary means good vacuum signal and optimum flow low speed on the street, no bogging! The bigger sec flows like crazy with 250 cu in at 3000+ rpm. Work out the flow rates, the Webers are just right.
