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Old 11-28-2010, 01:46 AM   #1
67Dad
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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
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Old 11-28-2010, 08:54 AM   #2
Shaky
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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
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Old 11-28-2010, 08:56 AM   #3
LockDoc
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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
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Old 11-28-2010, 09:59 AM   #4
Shyguy
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Re: mystery engine 250, 292?

Here is a picture of a 250 L6
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Old 12-07-2010, 04:18 PM   #5
67Dad
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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
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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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Old 12-07-2010, 10:12 PM   #6
LockDoc
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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
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