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#11
01-10-2015, 05:21 PM
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Quote:
I think the factory used a tighter tolerances for individual measurements and the parts to fit in them compared to other companies like Chevy. They are on the deck/bores sometimes too. The line worker would know to use a different piston for an 'M' compared to an 'L'. (same for crank, use different size main bearing according to the letter) These were not big numbers. Something like .0005" different. (or maybe even less) I have a bulletin where they changed the letters to 'L' and 'M'. (possibly around 1971? have to look it up)  Thanks for the pics, they are awesome!
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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