Quote:
Originally Posted by f5journal
I'll bite. Not sure, but 1964? I do know that it replaced the down tube off the back of the block
1968 brought some changes too
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The first one I saw was on my buddys '61 Impala with a 283 & 3 speed trans. This was on Long Island but like today It may have had California emissions.
It was common in the early '60's to yank these valves off and put the older pre '61 breather pipes on our 61-64 Chevy V/8's.
Made them faster you know-lol.