Mr. Gasket 2 Inch Air Cleaner Spacer 9343 body mounts and bushings Note: 1963 1968 Muncie (451) transmissions Year Make Model Submodel Note: 1963 1968 Muncie (451) transmissions use a stud (with a nut) coming off the shift fork of the transmission to secure the shift arm to the transmission and will require a different installation kit then this one Adjustable Yes Angle Straight Assembly Method Twist On Brand Earls Compatible Hose Auto Flex Compatible Hose Mr Gasket Black Nylon Compatible Hose Perform O Flex Compatible Hose Pro Lite 350 Compatible Hose Pro Lite 390 Emission Code 5 Finish Anodized Red and Blue Fitting to Hose Mate Type Cutter Hose End Family Swivel Seal Hose End Series 8 Hose End Size 6 AN Hose Size 6 AN Inside Diameter (in) 0 The 5 1 8 inch inner diameter fits most Holley it just sits on top of the carb between it and the air cleaner