New spark plugs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ljackson · 04-02-2010, 06:17 PM

I bought new spark plugs the other day for my 64 long step. When I pulled one out it was different than the ones that I bought. According to the parts store site, the 230 in a ‘64 should use a NGK 2636 GR4 or equivalent. This plug has a 13/16 hex and with a gasket seal. The plugs that are in it now are AC 46 TS. This plug has a 5/8 hex and a taper seal. The machined area in the head is too small for the 13/16 plug. So I spent the better part of today doing research on my engine. I thought I had a 230. Now I believe it is a 250. I have looked through this site, Stovebolt, Inliners and many others. I was able to find a match for my block casting numbers on the site http://www.enginepartswarehouse.com/...ERALMOTORS.PDF
They list the engine as a ’73- ‘79 250ci. My block has a 3 hole starter mounting that bolts on from the end not the bottom. The top bolt threads into the housing. The starter looks like the one from AZ for a 230. This is confusing. Can the 250 use this style starter too? From the head casting #, http://www.inliners.org/tech/heads/headindex.htm shows it to be a ’73- ’79, 250ci., 72.76cc or from a “75-85, 250ci., 72.76cc

Casting numbers
Pass. Side in front of the starter: 348675
GM
Above starter: CON 2 F44
Head above the dist between 1st and 2nd spark plug: 2084F58
Head: top under cover near the clock:
GM B148 331184 clock
45
Stamped numbers (are these referred to as the engine serial)?
Pad to the rear the dist: F060b TDF 2nd row: C47176345

Am I looking at the right numbers? If you have any info please let me know.

*lakeroadster* · 04-02-2010, 07:13 PM

Looks like the pre-73 250's were 2 bolt starters and the 73-79 were 3 bolt starters. Check out this link: http://remanufactured.com/Chevrolet_...er_Engines.htm

Also, your 348675 block number does indeed mean you have a 73-76 250 Cu-In.

www.jameshalderman.com/data/misc/a1/1.xls
http://www.enginepartswarehouse.com/...ERALMOTORS.PDF

I hope this helps.

ljackson · 04-02-2010, 07:19 PM

Thanks Lake

I also found this on the Halderman site:
http://www.jameshalderman.com/data/misc/a1/3.xls Head Numbers
Head #'s 331184
292ci 72-90
250ci 70-76
66-76
67-85

04-02-2010, 06:17 PM	#1
ljackson Registered User Join Date: Apr 2009 Location: Amarillo, Texas Posts: 636	New spark plugs I bought new spark plugs the other day for my 64 long step. When I pulled one out it was different than the ones that I bought. According to the parts store site, the 230 in a ‘64 should use a NGK 2636 GR4 or equivalent. This plug has a 13/16 hex and with a gasket seal. The plugs that are in it now are AC 46 TS. This plug has a 5/8 hex and a taper seal. The machined area in the head is too small for the 13/16 plug. So I spent the better part of today doing research on my engine. I thought I had a 230. Now I believe it is a 250. I have looked through this site, Stovebolt, Inliners and many others. I was able to find a match for my block casting numbers on the site http://www.enginepartswarehouse.com/...ERALMOTORS.PDF They list the engine as a ’73- ‘79 250ci. My block has a 3 hole starter mounting that bolts on from the end not the bottom. The top bolt threads into the housing. The starter looks like the one from AZ for a 230. This is confusing. Can the 250 use this style starter too? From the head casting #, http://www.inliners.org/tech/heads/headindex.htm shows it to be a ’73- ’79, 250ci., 72.76cc or from a “75-85, 250ci., 72.76cc Casting numbers Pass. Side in front of the starter: 348675 GM Above starter: CON 2 F44 Head above the dist between 1st and 2nd spark plug: 2084F58 Head: top under cover near the clock: GM B148 331184 clock 45 Stamped numbers (are these referred to as the engine serial)? Pad to the rear the dist: F060b TDF 2nd row: C47176345 Am I looking at the right numbers? If you have any info please let me know. Attached Images __________________ Father and son built. Driven daily since 2012. 283, 3 speed. Mostly original. '81 PS and disk front. Fuel tank relocate. Maintenance, repairs and upgrades on his dime now. http://zacks64longfleet.shutterfly.com/ Higher res. photos in my gallery.

04-02-2010, 07:13 PM	#2
lakeroadster Account Suspended Join Date: Sep 2009 Location: High Plains of Colorado Posts: 2,485	Re: New spark plugs Looks like the pre-73 250's were 2 bolt starters and the 73-79 were 3 bolt starters. Check out this link: http://remanufactured.com/Chevrolet_...er_Engines.htm Also, your 348675 block number does indeed mean you have a 73-76 250 Cu-In. www.jameshalderman.com/data/misc/a1/1.xls http://www.enginepartswarehouse.com/...ERALMOTORS.PDF I hope this helps. Last edited by lakeroadster; 04-02-2010 at 07:13 PM.

04-02-2010, 07:19 PM	#3
ljackson Registered User Join Date: Apr 2009 Location: Amarillo, Texas Posts: 636	Re: New spark plugs Thanks Lake I also found this on the Halderman site: http://www.jameshalderman.com/data/misc/a1/3.xls Head Numbers Head #'s 331184 292ci 72-90 250ci 70-76 66-76 67-85 __________________ Father and son built. Driven daily since 2012. 283, 3 speed. Mostly original. '81 PS and disk front. Fuel tank relocate. Maintenance, repairs and upgrades on his dime now. http://zacks64longfleet.shutterfly.com/ Higher res. photos in my gallery. Last edited by ljackson; 04-08-2010 at 06:39 PM. Reason: added info from jameshalderman.com



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