Check the listing for details. Hurst 3734648 Competition/Plus 4-speed Installation Kit. Condition: New, Made in United States. Listed at 383.95 USD. Compatible with 1968 Chevrolet Corvette with Muncie (451) 4-speed transmission.; Hurst Competition/Plus shifters have been the benchmark of transmission control and race-proven since 1963, and still today are constructed using the same high standards that George instated back then. Hurst Competition/Plus installation kits are custom designed to fit directly into your vehicles, with the least possible modifications, and to give you firm positive shifts every time. This kit comes with everything necessary (shifter not included) to install your Hurst Competition/Plus shifter in your car. The Muncie (451) transmission can be identified by the fact they have a stud on the shift forks that secures the shift arm on the transmission with a nut.