Engine Decoding 86 GMC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

86454k30 · 12-17-2010, 12:31 AM

I was wondering if someone could give me a hand. I have been on 73-87.com and through my books I have and can not figure out which engine is in my truck. It is a 5.0L truck and 305 style manifolds. What has me questioning is there is NO bolt in the P/S very rear exhaust manifold hole(at fire wall). If I remember correctly 305 manifolds won't fit 350's for this reason.

Anyway....here is the information off the P/S block by the head.

TO823CEJ OR TC823CEJ

180101264 OR 18C101264

I cleaned it off and you can read it but it is hard to tell the c from the o.

Thanks in advance for any assistance because I have searched and came up 0!

**old Rusty C10** · 12-17-2010, 11:40 AM

anyone?

Slonaker · 12-17-2010, 01:27 PM

I don't know how to decode those numbers. It sounds like the engine has been replaced with a 350. My crate engine had two holes drilled in the heads so it could use the standard or 305 manifolds. Apparently you don't have a crate engine.

Slonaker

86454k30 · 12-17-2010, 05:01 PM

Thanks for the reply's. I figured out it is an older 305 without the double bolt holes. Was hoping a 350 but it is not.

mooseknuckles · 12-17-2010, 06:33 PM

I wish my 305 was a 350 also lol!

12-17-2010, 12:31 AM	#1
86454k30 Registered User Join Date: May 2008 Location: Spokane, Washington Posts: 596	Engine Decoding*delete found code* I was wondering if someone could give me a hand. I have been on 73-87.com and through my books I have and can not figure out which engine is in my truck. It is a 5.0L truck and 305 style manifolds. What has me questioning is there is NO bolt in the P/S very rear exhaust manifold hole(at fire wall). If I remember correctly 305 manifolds won't fit 350's for this reason. Anyway....here is the information off the P/S block by the head. TO823CEJ OR TC823CEJ 180101264 OR 18C101264 I cleaned it off and you can read it but it is hard to tell the c from the o. Thanks in advance for any assistance because I have searched and came up 0! Last edited by 86454k30; 12-17-2010 at 05:01 PM.

12-17-2010, 11:40 AM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Engine Decoding 86 GMC anyone? __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

12-17-2010, 01:27 PM	#3
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: Engine Decoding 86 GMC I don't know how to decode those numbers. It sounds like the engine has been replaced with a 350. My crate engine had two holes drilled in the heads so it could use the standard or 305 manifolds. Apparently you don't have a crate engine. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

12-17-2010, 05:01 PM	#4
86454k30 Registered User Join Date: May 2008 Location: Spokane, Washington Posts: 596	Re: Engine Decoding 86 GMC Thanks for the reply's. I figured out it is an older 305 without the double bolt holes. Was hoping a 350 but it is not.

12-17-2010, 06:33 PM	#5
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: Engine Decoding 86 GMC I wish my 305 was a 350 also lol!



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