mrrman

My 67 Firebird had a yellow engine until I painted it Pontiac blue. My friend said it could be a Copo engine....whatever that is??? What do these castings numbers mean....9790140 9129 6140 A048.
Thanks

tuske427

iTrader: (1)

First off- COPO is an acronym for "Central Office Production Order". It was a department in GM where people could make fleet orders (taxi cabs, etc) It became famous because a few people discovered loop holes in that cars that GM normally didn't allow certain displacement engines could be ordered there with them.


You can read here for some information on your Pontiac engine:

http://firstgenfirebird.org/firebird/1967/

http://www.pontiacpower.net/castnum01.html

1965GP

iTrader: (2)

What are the casting #'s on the center ports of the heads?

t_raven

iTrader: (12)

The most well known COPO cars are Yenko Camaros. I've never heard of any COPO Pontiacs. Pontiac blocks have the year in raised numbers by the distributor and the displacement in raised numbers on the side of the block. They can be hard to see with the engine in the car but you might be able to see them.

t_raven

iTrader: (12)

I looked through the casting numbers on there and didn't see 9790140 but 9799140 was on there and all with that code were HO 455s

johnta1

Use my page:
Engine Code Search

Toward the bottom of the page, shows what to look for.

The 9799140 is probably what that number should be, except the A048 sounds like a date code.
Which is Jan 4, 1968 (or 1978)

Need to recheck the engine again.

mrrman

Okay i will check it out...another site member told me it was

"Its a 1970 Pontiac 455

Its a High Output Block out of a B-Body probably a GTO, 370 HP stock Nice freaking block and find if you ask me!!

I will double check the #'s

1965GP

iTrader: (2)

B bodies were full size cars (bonneville, Catalina, etc. ). I think all 70 455's were tapped for 4 bolt mains.