ZL-1 stamping numbers

[GMH454]

COPO, when Porterfield gave me the racing sheets he told me to look at the engine very carefully. When I looked in the lifter valley I was very surprised to find a set of stampimgs. Get out the flashligt and find someone with REALLY good eyesight. Mine were stamped on what look like bosses in the valley. In between watching the Olympics here I WILL dig out the remainder of the numbrers. Also check to see if your block is stamped with the 356 anywhere else other than the caps.

[GMH454]

COPO, the 107 is on the outside of the block at the back on a kinda boss at the top of the bellhousing area.
Cast numbers are date 1.28.69, numbers below are 128 number in circle to the right is 6.
Checked Porterfields letter (for which I am very grateful of)and the stamped number on the pad - 1-8880-61-A may be an order number.
McLaren had orders starting with 1-8880- also. Though thinking about it they should have been Can Am (Reynolds Blocks Hmmmm)
Does anyone know what the 107 means and do other ZL-1 engines have numbers on the blocks matching their cap numbers. ANY info appreciated

[JoeC]

GMH454, Do you know the cyl. bore diameter of your block? The CAN AM block started at 4.400 in. dia. and had siamese cast iron liners. I believe the Can Am Reynolds Alu. Blocks had no liners.

[GMH454]

Good point Joe. Its 40th over a standard bore. Which is funny cause I think the Green Book says they should only be bored 30th. Still looks to have plenty of strength between the bores, and they are sleeved. I have checked them before and they are the standard Zl-1 numbers.
Are the ZL-1 casting dates known anyone ?

[JoeC]

for the ZL1 fans - there is a "new" ZL1 on ebay
http://cgi.ebay.com/ebaymotors/aw-cg...215381&r=0&t=0

[GMH454]

Sorry guys you probably guessed I wrote the date wrong. Was 2.4.69.