Peter,
Plymouth had both the Satellite and Fury
Police Engines
* 360/175 HP ~ '2-Barrel'
* 400/190 HP ~ '2-Barrel'
* 400/225 HP ~ '4-Barrel'
* 440/230 HP ~ '4-Barrel'
* 440/280 HP ~ '4-Barrel' {Satellite only}
* 440/285 HP ~ '4-Barrel' {Fury only}
Gear Ratio's
* 2.76
* 2.93
* 3.23
* 3.55
That's a wide range, just on the Plymouth side.