Straight 6 Engine Identification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

63C20stake · 05-18-2021, 10:58 AM

I know this topic has a lot of coverage on this Forum and various others. However my particular 6 does not fall strictly into one set of specifications. Do i have a Frankenstein? Okay so I have a 63' C20 with a stake-side bed, the original owner told me when i bought it that it had a 292. However as I am replacing the clutch, and reading the manual my conflict begins. The Clutch currently in it is a 10" Diaphragm with the 168 tooth flywheel. My manual says a 10" Diaphragm did not come with a 292 but with a 230. It says the 292 only cane with a 12"coil. Next my gallery covers have a height of 4" signifying the smaller engine. My fuel pump is centered on the block, not offset forward. The motor Mounts are staggered with the passenger side forward (292). Finally the number on the block 3789404, comes up as a 292. What is going?

**cwcarpenter98** · 05-18-2021, 11:20 AM

Definitely sounds like you have a 292. What probably happened was your clutch got replaced with a 10" instead of the 12"

63C20stake · 05-18-2021, 09:33 PM

But the covers having a height of 4"?

**cwcarpenter98** · 05-18-2021, 11:11 PM

Post up some pictures. That would help out a ton in identifying what you truly have

05-18-2021, 10:58 AM	#1
63C20stake Registered User Join Date: Mar 2021 Location: Fortuna California Posts: 2	Straight 6 Engine Identification I know this topic has a lot of coverage on this Forum and various others. However my particular 6 does not fall strictly into one set of specifications. Do i have a Frankenstein? Okay so I have a 63' C20 with a stake-side bed, the original owner told me when i bought it that it had a 292. However as I am replacing the clutch, and reading the manual my conflict begins. The Clutch currently in it is a 10" Diaphragm with the 168 tooth flywheel. My manual says a 10" Diaphragm did not come with a 292 but with a 230. It says the 292 only cane with a 12"coil. Next my gallery covers have a height of 4" signifying the smaller engine. My fuel pump is centered on the block, not offset forward. The motor Mounts are staggered with the passenger side forward (292). Finally the number on the block 3789404, comes up as a 292. What is going?

05-18-2021, 11:20 AM	#2
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,485	Re: Straight 6 Engine Identification Definitely sounds like you have a 292. What probably happened was your clutch got replaced with a 10" instead of the 12" __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson

05-18-2021, 09:33 PM	#3
63C20stake Registered User Join Date: Mar 2021 Location: Fortuna California Posts: 2	Re: Straight 6 Engine Identification But the covers having a height of 4"?

05-18-2021, 11:11 PM	#4
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,485	Re: Straight 6 Engine Identification Post up some pictures. That would help out a ton in identifying what you truly have __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson



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