Tri-powers...again
Thread Starter
Burning Brakes
Joined: Dec 1999
Posts: 1,088
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From: Silver Spring, Md.
Tri-powers...again
One not to assume most things, I was wondering what, if any performance differences exist btwn the '67 "high rise" rectangle port manifold and the '68 and '69 "low rise" rectangle port manifold. Not concerned with numbers correct resto but for a performance engine. Any input appreciated. Mike
Last edited by stinky; Aug 24, 2004 at 01:30 AM.
Le Mans Master
Joined: Oct 2000
Posts: 6,209
Likes: 33
From: Texas-out west
only real difference is the 67 intake is taller which results in a 10-15 horsepower gain over the low riser intake on the 68-69s at the upper rpms, this is according to chevy. hood clearance would also be an issue unless you had l-88 hood. 
