The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - PROJECT: How would a Chevrolet dealer build a shop truck in the early 1970s?

**mattfranklin** · 10-14-2015, 11:44 PM

None of the bores show over 0.002 wear.
About half showed less than 0.001 wear.

Method: set inside micrometer for 4.032 (and later 4.031) and tried tipping it and jiggling inside the bore to see if I could make it change directions. At 4.032 I couldn't make it tip in any of the cylinders no matter how I tried. At 4.031 if I tried really hard I could make it tip in about half of the cylinders near the top of the bore.

10-14-2015, 11:44 PM	#51
mattfranklin Senior Member Join Date: Dec 2011 Location: Moraga, CA Posts: 801	Re: PROJECT: How would a Chevrolet dealer build a shop truck in the early 1970s? None of the bores show over 0.002 wear. About half showed less than 0.001 wear. Method: set inside micrometer for 4.032 (and later 4.031) and tried tipping it and jiggling inside the bore to see if I could make it change directions. At 4.032 I couldn't make it tip in any of the cylinders no matter how I tried. At 4.031 if I tried really hard I could make it tip in about half of the cylinders near the top of the bore. __________________ (Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340