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#1
10-01-2018, 10:18 PM
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When did Chevy quit drilling oil cooler holes on 4 bolt blocks ?
Hi all,
I bought a homebuilt 427 parts motor a couple weeks ago and found the the 289 block is stamped for a '72 Chevelle LS5 (T1112CRW). Surprise #2 was the block is a 4 bolt. My guess is it was converted as the oil cooler holes aren't drilled. I recall factory 4 bolt blocks were drilled up until '74 or so. Am I remembering right ? I'm sure somebody knows off of the top of their head. Thanks, Dave 
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