| Year | Bore and Stroke | Number of Main Bearings | Type of Valve Lifter Used | Cubic Inch Displacement | AMA Horsepower | Standard Advertised Horsepower at Stated RPM | Advertised Torque at Stated RPM | Compression Ratio | Oil Pressure At 30 MPH (Note 1) | Cam Shaft Drive |
| 1951 6 Cyl., L Head St.8, L Head |
3 8.16x4 3 3/8x3 3/4 |
4 5 |
Mech. Adj. Mech. Adj. |
239.2 268.4 |
30.4 36.4 |
96@3400 116@3600 |
161@1200 220@2000 |
6.5-1 6.5-1 |
30 30 |
Chain Chain |
| 1952 6 Cyl., L Head W/S 6 Cyl., L Head W/H St.8, L Head W/S St.8, L Head W/H |
3 9/16x4 3 9/16x4 3 3/8x3 3/4 3 3/8x3 3/4 |
4 4 5 5 |
Mech. Adj. Mech. Adj. Mech. Adj. Mech. Adj. |
239.2 239.2 268.4 268.4 |
30.4 30.4 36.4 36.4 |
100@3400 102@3400 118@3600 122@3600 |
189@1400 194@1400 222@2200 227@2200 |
6.8-1 7.7-1 6.8-1 7.7-1 |
30 30 30 30 |
Chain Chain Chain Chain |
| 1953 6 Cyl., L Head W/S 6 Cyl., L Head W/H St.8, L Head W/S St.8, L Head W/H |
3 9/16x4 3 9/16x4 3 3/8x3 3/4 3 3/8x3 3/4 |
4 4 5 5 |
Mech. Adj. Mech. Adj. Mech. Adj. Mech. Adj. |
239.2 239.2 268.4 268.4 |
30.4 30.4 36.4 36.4 |
115@3800 118@3800 118@3600 122@3600 |
193@2000 197@2000 222@2200 227@2200 |
7-1 7.7-1 6.8-1 7.7-1 |
30 30 30 30 |
Chain Chain Chain Chain |
| 1954 6 Cyl., L Head W/S 6 Cyl., L Head W/H St.8, L Head W/S St.8, L Head W/H |
3 9/16x4 3 9/16x4 3 3/8x3 3/4 3 3/8x3 3/4 |
4 4 5 5 |
Mech. Adj. Mech. Adj. Mech. Adj. Mech. Adj. |
239.2 239.2 268.4 268.4 |
30.4 30.4 36.4 36.4 |
115@3800 118@3800 122@3800 127@3800 |
193@2000 197@2000 226@2200 234@2200 |
7-1 7.7-1 7.7-1 7.7-1 |
30 30 30 30 |
Chain Chain Chain Chain |
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