L88 question

[69 L88 RACER]

I have a question about the mid 1969 L88 corvette,They started using the open chamber 074 Aluminum head in mid 69,This much I know for sure. But was the cam the same?? I need info to prove that the second design cam was in fact the same as the ZL1. Can anyone help?? I am building a car for the Pure Stock Drags this summer and need paperwork to take along.

[JohnZ]

The second design L-88 cam was P/N 3928909 (casting #3928911); the ZL-1 cam was P/N 3959180 (casting #3959181); duration was the same for both cams, but the ZL-1 cam had .579" intake lift (vs. .562" for the L-88) and the ZL-1 had .620" exhaust lift (vs. .584" for the L-88). Not the same cam.