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** · 01-11-2016, 06:24 PM

Some engine progress...

I was amazed that I wore out two 7/16"-14 taps chasing out the head bolt holes. I used to think that as long as I was careful didn't break a tap they would last forever. I guess not. Now, I did use a cheaper brand of tap, "Vermont American." And the block is a high-nickel 3970010. So with better taps or a different block material they might have lasted longer.

I think one more good brushing of the bare block with hot soapy water and I'll be ready to start reassembling the short block, too.

Have not touched the heads yet.

01-11-2016, 06:24 PM	#56
mattfranklin Senior Member Join Date: Dec 2011 Location: Moraga, CA Posts: 808	Re: PROJECT: How would a Chevrolet dealer build a shop truck in the early 1970s? Some engine progress... I was amazed that I wore out two 7/16"-14 taps chasing out the head bolt holes. I used to think that as long as I was careful didn't break a tap they would last forever. I guess not. Now, I did use a cheaper brand of tap, "Vermont American." And the block is a high-nickel 3970010. So with better taps or a different block material they might have lasted longer. I think one more good brushing of the bare block with hot soapy water and I'll be ready to start reassembling the short block, too. Have not touched the heads yet. __________________ (Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340