specs of 403 and 455

[chuck botts]

When I was searching for the differences, I found the following specs

455: 212 HP @ 3400, 344 ft-lbs @ 2400, CR 8.5:1 91 Octane or higher

403: 200 HP @ 3600, 330 ft-lbs @ 2400, CR 7.9:1 87 Octane or higher