City: Livermore State: California Price: $750 USD City: Livermore State: California Price: $800 USD 1964 1965 Muncie 4 Speed M20 M21, Hurst Comp Linkage & Bell Housing 4 speed Muncie transmission , hurst competition linkage and shifter. Aluminum gm aluminum bellhousing and fork. Original 11 inch GM bell housing code 3899621 Main Transmission case 3851325 Tailshaft housing 3857584 Side cover casing 3831707 Local pickup Four speed