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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2006 Posts: 222 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 222 | Hi All,
I have a pair of 283 heads that have the pyramid symbol on the ends of the heads. The number is 3884520. I am told they are 55cc powerpack heads from around the mid to late 1950's. If this is correct, are they valuable? I know that in the performance world even the camel hump heads are old news but I wonder if these have any collector value. What do you think?
Rick | | | | | Joined: May 2005 Posts: 145 Wrench Fetcher | | Wrench Fetcher Joined: May 2005 Posts: 145 | a google search indicates they have a 60cc chamber and were on 283s from 1960 to 1967. http://www.mortec.com/castnum.htm cheers, mv | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | every early sbc head in my large pile has the pyramid - and as Mike sez, that number reads as 60-67 283/327 .... the "collector value" would simply be if someone wants the particular casting mumber for their 100 point resto .... I collect them for $0  Bill | | | | | Joined: Feb 2007 Posts: 434 Shop Shark | | Shop Shark Joined: Feb 2007 Posts: 434 | They seem to be pretty common. They are on my 59 that had a 283 swapped in it. I have used the casting numbers to determine it is a 64 or 65 motor.
R-Bo
1959 Apache 1/2 ton Big Window, Short bed Fleetside (under reconstruction)
1966 GMC 305V6 in the family
| | | | | Joined: Feb 2006 Posts: 222 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 222 | Thanks for the info, and thanks for the mortec site! Well it looks like I will be keeping my job after all, I won't be getting rich off these heads! Thanks for helping.
Rick | | | | | Joined: Apr 2005 Posts: 641 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 641 | they are 4 barrel heads if they didnt have the perimid they would have been 2 barrel heads | | | | | Joined: Sep 2002 Posts: 158 knuckle head | | knuckle head Joined: Sep 2002 Posts: 158 | Mid 60's 195 hp 2bbl 283's had those heads as well as 250 hp 4bbl 327's. | | | | | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | They would be worth more if you had the rest of the engine under them, LOL,
Scott | | |
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