help with casting # - The 1947 - Present Chevrolet & GMC Truck Message Board Network

byrd · 03-22-2006, 09:00 PM

I pulled the vavle covers off afterburn tonight and all looks well. I got the casting #'s off the head and here they are
K-16-72
8998998
Is that right, they are really kinda hard to read?
What do they mean as far as HP and I would assume they are
original?? Lil help would be greatly appreciated...Randy

**too much stuff** · 03-22-2006, 09:28 PM

Hey randy, i am guessing they are 3998993 which would be 69-74 truck or pass car. 350 or 307. MAYBE a 72 vette with 200 hp. My book also reads "light duty". Hope this helps, Eric

72armyswbtruck · 03-22-2006, 09:32 PM

Check out this link
http://www.mortec.com/castnum.htm

GMan69 · 03-22-2006, 10:14 PM

with too much stuff. I think that's 3998993. I think they will also say "Hecho en Mexico" somewhere close to that casting # or date code.
The late John Lingenfelter listed these along with the 487 and 441 as the only large chamber heads he would consider rebuilding. However, at the time he wrote this opinion, the Vortec head was just becoming known for its performance capabilities.

byrd · 03-22-2006, 10:58 PM

Thanks for the help guys!! Gman I pretty sure they are Made in USA as I don't remeber seeing mexico on it and from the 72 casting # or is that # not the year? Sorry I don't know jack about motors. Eric I believe this maybe the original heads on the truck and a newer block IE right side alt and LWP. I 'm not sure but it looks like the mounting holes in the head is there for the correct location of the alt, would that mean they are 72 heads and does the block matter on the location of the PS pump and alt?clik on the link in sig for pics of the motor. Thanks so much for the help!!!!! Randy

**too much stuff** · 03-22-2006, 11:09 PM

My book reads accy mounting holes for those heads, and K-16-72 should be nov 16 1972, which should be the 73 model year. If you can get date code and cast # off the back of the block, i can identify that also. Sorry, but i'm not sure on the PS mount and alt. The blocks were the same for a number of years.

03-22-2006, 09:28 PM	#2
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,769	Re: help with casting # Hey randy, i am guessing they are 3998993 which would be 69-74 truck or pass car. 350 or 307. MAYBE a 72 vette with 200 hp. My book also reads "light duty". Hope this helps, Eric __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

03-22-2006, 09:32 PM	#3
72armyswbtruck Registered User Join Date: Feb 2004 Location: Idaho Posts: 4,034	Re: help with casting # Check out this link http://www.mortec.com/castnum.htm __________________ "Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!"

03-22-2006, 10:14 PM	#4
GMan69 Registered User Join Date: Mar 2001 Location: Hernando, MS USA Posts: 1,152	Re: help with casting # with too much stuff. I think that's 3998993. I think they will also say "Hecho en Mexico" somewhere close to that casting # or date code. The late John Lingenfelter listed these along with the 487 and 441 as the only large chamber heads he would consider rebuilding. However, at the time he wrote this opinion, the Vortec head was just becoming known for its performance capabilities. __________________ George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside

03-22-2006, 11:09 PM	#6
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,769	Re: help with casting # My book reads accy mounting holes for those heads, and K-16-72 should be nov 16 1972, which should be the 73 model year. If you can get date code and cast # off the back of the block, i can identify that also. Sorry, but i'm not sure on the PS mount and alt. The blocks were the same for a number of years. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

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