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#1 |
Registered User
Join Date: Mar 2010
Location: houston texas
Posts: 84
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mystery engine 250, 292?
Hi All:
In our project, the SPID on the truck (1967) says it has a 292 inline 6. It DOES have an inline 6. After taking it apart, engine cylinders (measured with a regular dial caliper) measure 3.915 diameter. Stroke 3.5 +/- (sort of measured from cylinder wear marks,etc. not a great measurement yet, and crank is already off), which would go along with this being a later year 250 bored out .030. (The engine casting is 328576, which on the net points to a 68+ 250 CID.) For parts, etc., are we safe to conclude it is a 68 250, bored once? (Oh yes...one more factoid...One piston appears to be original size, but cylinder it came out of is oversize.) Thanks! Mark
__________________
Mark 57 Austin Healey 3000 (sold many moons ago, unfortunately) 67 C10 (in progress, son's) w/ 1993 350 SBC, '96 Vortec heads (custom polished ports), EPS Performer intake, Holley carb, cam, MSD ignition 93 C4 Corvette (mostly done, son's) |
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#2 |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: mystery engine 250, 292?
When I'm trying to tell 250 from 292 the easy tell is the fuel pump location.
Fuel pump forward of engine mount = 250 Fuel pump aft of engine mount = 292
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#3 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,482
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Re: mystery engine 250, 292?
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The easy way to tell for me is by the side covers. On the 250 they are about 4" tall and on the 292 they are about 6" tall. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#4 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: mystery engine 250, 292?
Here is a picture of a 250 L6
__________________
'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#5 |
Registered User
Join Date: Mar 2010
Location: houston texas
Posts: 84
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Re: mystery engine 250, 292?
Confirmed several ways that it is a 250. Found cracked cylinder when took apart "for fun".
Do any of you know if a 93 350 4 bolt will fit OK in the 67 c10 (it may be what we try to replace it with). Any issues? Thanks for all the help! Mark
__________________
Mark 57 Austin Healey 3000 (sold many moons ago, unfortunately) 67 C10 (in progress, son's) w/ 1993 350 SBC, '96 Vortec heads (custom polished ports), EPS Performer intake, Holley carb, cam, MSD ignition 93 C4 Corvette (mostly done, son's) |
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#6 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,482
|
Re: mystery engine 250, 292?
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You will need to swap out the six cyl engine frame mounts for a pair of V-8 ones and probably change the radiator out for a three core one. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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250, 292, inline six, l6 engine |
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