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Jul 21st, 2025 | | | | Joined: Apr 2007 Posts: 147 Shop Shark | | Shop Shark Joined: Apr 2007 Posts: 147 | I have a 1978 C65, single axle dump truck, and I wonder if there is any way to identify whether the
engine is a 366 or a 427. This truck is one of the years where they were changing the format of the codes,
and the engine type is not listed on the tag.
I don't know if this information is helpful, but the engine is a light blue colour, and is coupled to a 5 spd transmission
and a two speed rear axle.
Bob
55 Cameo 396 TH 400 with overdrive
65 Caliente conv
67 BB Caliente conv
67 Mercury 1 Ton
76 GMC 3/4 ton 454ci
84 Buick Turbo Regal
| | | | | Joined: Mar 2004 Posts: 6,189 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,189 | Is your truck American or Canadian made? Mike B  | | | | | Joined: Nov 2005 Posts: 6,061 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,061 | Hy BigBlockCameo, my newest service manual is a 1977, it says the standard engine for a CE65 is a 366 with the option being a 427. There is supposed to be an engine identification plate on the front upper side of the right hand valve cover, 366 - GM114-366 CID, 427 - 114- 427 CID, hope that helps. | | | | | Joined: Feb 2004 Posts: 28,675 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,675 | There should be a letter/number sequence stamped (not cast) on a machined pad on the front of the engine block just ahead of the passenger's side cylinder head. The last few digits in the sequence which are usually letters, will identify the engine size and possibly the year it was manufactured. There are several engine number conversion websites on the internet.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | | | | | | Joined: Jul 2008 Posts: 326 'Bolter | | 'Bolter Joined: Jul 2008 Posts: 326 | BBC,
What is the casting number? There were several numbers through the 60s, 70s,etc. for the truck tall deck blocks. That might help to narrow it down. Also is there a RPO sticker on the truck? That may have a code for what was originally installed.
SimS | | |
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