427 Aluminum Block Numbers

Pantera · #1 02-19-2004, 03:45 AM

How could that be a Alum block? I thought the ZL-1 blocks came out in '69?
Sounds more like a alum head L-88 motor but I was not aware that they put them in a Pass car back in 1968 according to the vin #?? That is a '68 S/N is it not?

GMH454 · #2 02-19-2004, 08:56 PM

Glad you asked it. Its been puzzling me.

jg95z28 · #3 02-20-2004, 02:51 AM

You guys are right. If those numbers are correct it is indeed a cast iron block.

JChlupsa · #4 02-20-2004, 03:38 AM

John Z says its a out of a 68 Caprice from the Janesville plant

rpoz11 · #5 02-21-2004, 05:46 PM

As far as Im aware of there are 3 BB aluminum casting numbers but I still am searching to see if there are any "0" code prototypes ever made. Im in conversations with my NCRS judge friend trying to eventually document these. RoadCourse and 1/4 mile guys to me are where I find these and occasional Marine shops Ive seen these at. Ill keep digging until Im exhausted on my searching...

Also, as there were a few Small Block GM aluminum castings; Is there any Board knowledge of those #'s?

**KNAPPY** · #6 02-21-2004, 06:51 PM

What kind of numbers would an "o" block have?

rpoz11 · #7 02-21-2004, 06:53 PM

0-123456 This would be what GM did when making Prototype pieces; This was there way of Identifying non-DOT parts manufacturing.

**KNAPPY** · #8 02-21-2004, 08:20 PM

How about 0-326711

jbsides · #9 02-22-2004, 06:10 AM

Do you mean this one Knappy? (Sorry about the flash glare)

JB

**KNAPPY** · #10 02-22-2004, 04:15 PM

I have an aluminium block with thoses numbers. What are those numbers in the picture on?

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