455 ID Numbers

Joesgarage · 05-10-2007, 01:14 PM

I have a 455 that the owner before me installed not sure what year it is or where the stamp or casting numbers are?
It does have large spark plugs and a EGR on the intake, so I was kinda thinking about 1969.
Also what are the good heads for this era of engine?
Steve

joe_padavano · 05-10-2007, 07:46 PM

If the intake is original to the engine, it's a 73-76 motor. EGR was not used prior to 1973. Check the large raised letter next to the No. 1 and No. 8 spark plugs. I'll bet it's a "J", which would signify the smogger heads used on the 73-76 motors.

To definitely learn the year of the block, you'll need to check the VIN derivative. See this thread:

http://www.classicoldsmobile.com/for...html#post13537

05-10-2007, 01:14 PM	#1 (permalink)
Joesgarage Junior Member Join Date: May 2007 Location: WV Posts: 18	455 ID Numbers I have a 455 that the owner before me installed not sure what year it is or where the stamp or casting numbers are? It does have large spark plugs and a EGR on the intake, so I was kinda thinking about 1969. Also what are the good heads for this era of engine? Steve

05-10-2007, 07:46 PM	#2 (permalink)
joe_padavano Moderator Join Date: Mar 2007 Location: Northern VA Posts: 1,734	If the intake is original to the engine, it's a 73-76 motor. EGR was not used prior to 1973. Check the large raised letter next to the No. 1 and No. 8 spark plugs. I'll bet it's a "J", which would signify the smogger heads used on the 73-76 motors. To definitely learn the year of the block, you'll need to check the VIN derivative. See this thread: http://www.classicoldsmobile.com/for...html#post13537 __________________ Joe Padavano 64 Jetstar 88 Conv 66 442 L-69 Conv 68 W-30 69 H/O 69 442 70 W-30 72 442 84 Custom Cruiser 86 Caprice wagon (w/307 Olds)

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