1965 Chevelle 300, 396/425 M22 COPO

[JoeC]

here is the Z-16 prototype

https://www.mecum.com/lots/SC0509-79...evelle-ss-z16/

[fsc66]

I asked Jeff Helms about the IY code listed in Alan Colvin's book and why it listed the engine as a 396/375 HP motor.
From Jeff: "When Alan wrote the book he did not have the COPO sheets from Tonawanda yet that explained the engine was a 396/425 and how to build it, so it remains correct as a 396/425 motor. Someone out there has the specifics on the COPO build, I'm sure we'd all love to see
Also, perhaps someone has information on the engine past number listed; 3888819 or the other COPO motor listed above this one, COPO 9557: 3882847?
Paul

[WILMASBOYL78]

Originally Posted by JoeC

here is the Z-16 prototype

https://www.mecum.com/lots/SC0509-79...evelle-ss-z16/

..

They refer to the engine as an L-78...but that is not correct, shouldn't it be L-37.

This is an interesting thread...never knew about this car until now.

-wilma