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Old 01-07-2007, 10:22 AM
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special high performance intake

Hey all,

I am looking for info regarding a 67-68 camaro intake. I guess it is what they call a special high performance intake. I cant seem to find a lot of info on this. Are these anything that special? Thanks.

Ben

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Old 01-07-2007, 10:30 AM
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That would probably be the aluminum high rise used on the '67-'71 Z/28 and the LT-1 Corvettes. If that is indeed the one you are referring to there are volumes of information available on it. It is an excellent street dual plane, one of the best ever made for the SBC. It worked so well Holley copied it as the 300-36. There are better manifolds now but it is still a very good piece. It's worth more to restorer's if it has the date codes they need than to hot rodders but it will still fetch a decent price.
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Old 01-07-2007, 10:37 AM
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its not an aluminum high rise, its a cast iron intake. The number stamped on it is 3919803 and has GM 1 stamped underneath that. Closer to the carb there is a number H237. The only info I have found is that is for rochester 4bbl and it went on a 327 or 350. My uncle that gave it to me said it was off of a camaro. Thanks for the info.

Ben
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Old 01-07-2007, 11:36 AM
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As far as I know, all the SHP engines in those years had aluminum Winters intakes.
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Old 01-07-2007, 01:14 PM
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Are you talking about the 2x4 cross ram intake for the 67-69 Z-28 ??
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Old 01-07-2007, 01:18 PM
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the intake looks like a stock intake from a 350 sbc, except the mounting base on the carb has this area that is a indented curve on the front of the mounting base. I had to get a special gasket for it from the parts store, and its listed in the catalouge as a special high performance intake. Its not a 2X4 cross ram intake.
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Old 01-08-2007, 12:06 PM
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In 67 and 68 the cast iron Q jet intake was on the 300 and 275 HP 327's. These engines had the "fuelie, camel hump, double hump" or how ever you wanted to call them, heads.

There was NOTHING special high performance about it. Unless you consider a 4 bbl high performance over a 2 bbl.
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Old 01-08-2007, 12:22 PM
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Looks like Zipfactor has it covered. Itīs also called the "Z-28 intake". It was a big deal then and is still going strong. One of the best intakes ever from GM for SB
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Old 01-08-2007, 12:55 PM
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Quote:
Originally Posted by zipfactor
the intake looks like a stock intake from a 350 sbc, except the mounting base on the carb has this area that is a indented curve on the front of the mounting base. I had to get a special gasket for it from the parts store, and its listed in the catalouge as a special high performance intake. Its not a 2X4 cross ram intake.
Like 'larryblack' said it's just a cast iron Q-Jet intake, the parts catalog listed anything with a 4 Bbl. and dual exhaust as "Special High Perf." back then. They all had that crossover passage under the front so they required a gasket set with a stainless steel shim. Don't throw it away, it's better than a 2 bbl. but nothing "special".
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Old 01-08-2007, 02:11 PM
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It's my understanding that one of the currently available SB intakes being sold by GM Performance is a cast iron version of the early Z28 intake.
If it were an original early Z28 intake (68-70), it definitly would be aluminum with the Winters "W" on it.
JA

I looked up the casting number in "Cars & Parts Magazine Chevy V-8 Engine Casting Numbers: 1955-93" and it's listed as a '68, 327 pass,Chevelle,Corvette,Camaro,Nova cast iron Quadrajet manifold.

Last edited by johnnya; 01-08-2007 at 02:21 PM.
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Old 01-08-2007, 02:21 PM
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I just looked in my GM perf parts catalog, it shows a cast iron version of the Z-28 int. part#14096011. It says for "chevy enthusiasts" on a budget or for racers who's class requires a cast iron intake. The mounting flange will accept both square and spread bore carbs. Still as said nothing special and why add the extra weight unless you just WANT that manifold. An Edelbrock Performer would be much better........my opinion.
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Old 01-08-2007, 02:38 PM
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my uncle gave it to me, and it was free so that is why I use it
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Old 01-08-2007, 06:34 PM
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Does it have the 4 holes (2small,2large) under the carb or is it 2 open spaces divided lengthwise down the middle, like a Performer or other aftermarket dual plane intakes. The cast iron GM z28 intake looks like a cast iron version of the Performer, it doesn't have the four holes.
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Old 01-08-2007, 08:15 PM
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Quote:
Originally Posted by zipfactor
my uncle gave it to me, and it was free so that is why I use it

That says it all, it's not a "bad" manifold it's just not "special". For that price you can't beat it!
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