My dad tried running those manifolds on the street and burned them up.
They had been patched and repatched, with repairs on top of patches, until he finally made a pair of tubular steel headers. They were really short, so much so that you could look up through the collector and see daylight.
Mac McKellar saw those headers and really like them and said "I'm going to design you a cam for those". So he did. He even stamped the production numbers on the end.
The Ramchargers protested Dad one time and made him tear down. They checked that cam on the tailgate of their station wagon, laying in V blocks and with dial indicators, and pronounced it OK even though it was bogus as hell.
K
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'63 LeMans Convertible
'63 Grand Prix
'65 GTO - original, unrestored, Dad was original owner, 5000 original mile Royal Pontiac factory racer
'74 Chevelle - original owner, 9.56 @ 139 mph best http://www.superchevy.com/features/s...hevy-chevelle/
My Pontiac Story: http://forums.maxperformanceinc.com/...d.php?t=560524
"Intro from an old Assembly Plant Guy":http://67-72chevytrucks.com/vboard/s...d.php?t=342926
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