Gm crate engine swap ?
Thread Starter
Racer
Joined: Sep 2004
Posts: 482
Likes: 1
From: Brandon Manitoba
Gm crate engine swap ?
I have been looking into a Gm cratre engine swap for my 1980 corvette however most of the motors sold are of the vortec head design. To work with this vortec head you must have a higher style of intake manifold. Thus comes up this warning that this motor may not fit into a corvette because of tight clearances under the hood. Has anybody from the forum had any experience or advise to give on the use of GM crate motors in a corvette. 
Thanx Brent
Thanx Brent
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
you should be able to get the dimensions from the intake manifold company ...just compare them to what you know will fit....this is a popular conversion and it may be as simple as getting a differnent base for the carb air cleaner that drops down more... i don't think this is a really big issue....
Team Owner
Joined: Apr 2002
Posts: 62,198
Likes: 1
From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
the ZZ4 uses the centerbolt corvette heads. you could run a RPM airgap if you wanted the 1.25 drop base cleaner and a KN xtreme on top
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Melting Slicks
Joined: Jan 2004
Posts: 2,527
Likes: 1
From: St. Petersburg, Fl///Columbus, Ohio
GM PART # 12496820
CATEGORY: Engine Fuel Intake Manifold
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $304.35
OUR PRICE: $213.04
DESCRIPTION: MANIFOLD
This Vortec manifold was designed for ultimate horsepower and torque to be used with Vortec cylinder head, P/N 12529093, 12558060, 12497186 or 12464298. This aluminum four-barrel manifold will accept Holley or Quadrajet carburetors and is EGR equipped. Use intake manifold gasket P/N 12529094 and (8) special manifold bolts P/N 12550027
CATEGORY: Engine Fuel Intake Manifold
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $304.35
OUR PRICE: $213.04
DESCRIPTION: MANIFOLD
This Vortec manifold was designed for ultimate horsepower and torque to be used with Vortec cylinder head, P/N 12529093, 12558060, 12497186 or 12464298. This aluminum four-barrel manifold will accept Holley or Quadrajet carburetors and is EGR equipped. Use intake manifold gasket P/N 12529094 and (8) special manifold bolts P/N 12550027
4 months ago when I bought THIS intake it stated it would fit all Corvettes with limited hood clearance.... That part has been removed!
Well it fits under my hood without a drop base air filter.
Last edited by jcswm; Nov 14, 2004 at 10:27 AM.
Instructor
Joined: Sep 2004
Posts: 203
Likes: 0
Ram Jet 350 with vortech heads and an intake thats pretty damn high. Anyways, haven't put it in yet, but everyone claims its not goign to fit. Everyone with a Ram Jet on this forum has an L88 Hood. I think I'm gonna go with the 2" Dominator, I like the look and it eliminates the wiper door.
Bry
Bry
