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