Whats the difference between the two barrel carbs on each of these engines? Are they different CFM's? Or just different jettings? Thanks

 

i really dont think theres much, if any, difference. i had a problem with my 2 barrel on my 302 so i went to the wrecking yard and got a 2 barrel off a 390, worked great, same gas mileage and performance. as for jetting, well the jetting is going by the cfm of the carb, not the engine size, air to fuel ratio thing.

 

thanks for the info!