Quote:
Originally Posted by 70 copo
Two apparent distinct and separate references.
One to a tougher block. The other to 4 bolt main caps.
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That promo was written long before they even cast an 3970010 block which didn't show up until the last part of April, 1969. "Tougher" could just be referring to a design change where some part of the block was beefed up.
I don't have a dog in this hunt, so it really doesn't matter one way or another to me.
Phil, are you saying there is credible evidence that "The best blocks have both tin and nickel, and show two numbers: 010 and 020, which means the block has 10% tin and 20% nickel."???
I don't believe anyone disputes there were a lot of design changes. If you have some GM documentation on the percentage of tin and nickel, I would be interested in seeing it. Just post it.