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#1 |
Registered User
Join Date: Jul 2013
Location: South Dakota
Posts: 3
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What year engine is this out of
This is the only picture I've ever found that looks the same as my engine in my 69 C10. Notice there are two breathers on top of the valve cover. Also some vacuum actuated valve on the air cleaner. Mine looks exactly like this (all the way down to the front breather not attaching to the air cleaner)
![]() I'm trying to figure where this combination came from because I don't believe it is original to the truck. Anyone have any ideas? |
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#2 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: What year engine is this out of
Wouldn't it be a whole lot easier to just post the casting number? Should be by the dipstick, if I remember, but haven't had a 6.
One is a PCV, the other is a breather. Every engine with a PCV needs a breather. The distributor is clearly a retrofit.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#3 | |
Registered User
Join Date: Jul 2013
Location: South Dakota
Posts: 3
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Re: What year engine is this out of
Quote:
I'm just trying to figure out what I presume is a Frankenstein is in this truck. |
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#4 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: What year engine is this out of
Quote:
I also think its amazing I can remember the color code breakdown for my two-tone truck in current PPG numbering but can never remember the names of any of the other parents at my kids' school.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#5 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,628
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Re: What year engine is this out of
It's a 75 and up 250 from a Nova. The hei like that was stock with an external coil. The valve on the cleaner was tied to the heat riser on the exhaust to provide warm air for cold start ups. IIRC the valve cover was like that for better hood clearance.
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#6 | |
Registered User
Join Date: Jul 2013
Location: South Dakota
Posts: 3
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Re: What year engine is this out of
Quote:
Anyway, thanks for the help! Someday I'll swap to a non-integral head but this one will do for now, as my trusty work horse truck. In case anyone finds this thread in the future. The casting numbers I found were 366855 for the block which tells me it's a 250. And 370696 for the head, which I can't find any information on. |
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#7 |
Registered User
![]() Join Date: Sep 2009
Location: Phoenix AZ
Posts: 105
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Re: What year engine is this out of
The vent on top instead of the side could be for clearance for ac compressor. The empty v-groove on pulley also leans toward this.
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