mystery engine 250, 292? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67Dad · 11-28-2010, 01:46 AM

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

11-28-2010, 01:46 AM	#1
67Dad Registered User Join Date: Mar 2010 Location: houston texas Posts: 84	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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