t-bogs were great on 440 cop cars, but for 1/4 mile its 440 six pack all the way. one reason port volume of intake/cfm flow, and throttle response of holly will spank a t-bog. for spread bore stock type single 4bbl intake t-bog is the best carb. the 1971 340s went the fastest ever with them on stock setups. but for racing or hot street car you dont see a guy putting a t-bog with adaptor on sigle plane m-1 intake....