I think i found a COPO engine Weird suffix

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**John Brown** · #1 06-12-2018, 04:44 AM

1968ss.com/bbcsuffix

IS shows as 1968 427 385 horsepower full size Chevrolet.

That doesn't prove it is a COPO though.

964IMPALA · #2 06-12-2018, 10:51 AM

John,this is not a 427 its a 396 the 15 suffix shows it as a COPO MOTOR go to the link here they provided me
Drivetrain Decoding |

396ci COPO 9627 (I5, JB)

This is from the link sent to me over at the Impala forum the 5th line down shows it.

396ci/325HP L35 IG IV IA

396ci Police IN IF IK

396ci COPO 9565 (313HP) IY? IW --
396ci COPO 9559 (IZ, I2, I3, I4)

396ci COPO 9627 (I5, JB)

427ci/385HP L36 -- IJ IH

427ci L36 SS427? -- IS IE

427ci L36 COPO 9626 (I6, I8)

427ci/425HP L72 -- --
ID * Engine code for L73 and L30 with TH350, used in late-year 1968 TH350 test fleet

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.