hey i was looking into putting 1990 aluminum corvette(L98) heads on my 1990 iroc in place of the cast heads and sending they aluminum heads to LINGENFELTER for port and assembly. but the guy told me that my intake wouldnt fit. i was just wondering if anyone could give me the facts. thanks..

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1990 IROC-Z L98 350 TPI
AFPR 49PSI, GUTTED AIR BOXES, K&N, RAM AIR, PORTED PLENUM, B&M SHIFTER, 3.23 LIMITED SLIP, DUAL CATS, STOCK SUPER TURBO EXHAUST, COOPER COBRA XST's

MUSTANGS...ONLY 4 LUGS....HAHA THAT IS HILARIOUS.

 

They should fit without issue. Since both are 1987+ motors. But hey, sould like a good excuse to upgrade to the dual pattern Edelbrock base JUST to make sure.

Kelly 'GhoSSt' Rosato

 

The guys right. Your stock TPI wont fit do to the angle of the 2 center bolts on each side of the manifold. L98 CAST's bolts are up and down where the Vette heads go in on an angle. The Edelbrock base fits both heads do to the bolt holes being machined for both style heads

 

Mkos is correct. The 87+ f-body heads changed to the 72º intake bolt pattern, but the Aluminum Corvette heads kept the <86 45º bolt pattern. You'll need a Corvette intake manifold, or an aftermarket intake manifold, to bolt these heads up properly.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

OK guys i understand now.. but do i have the option to have the holes drilled into the base plate. would that be possible. since it is just a hole.. and i do plan on putting a MR on my car after time. but i was going to get a good deal on these heads. but otherwise i will wait. thanks.

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1990 IROC-Z L98 350 TPI
AFPR 49PSI, GUTTED AIR BOXES, K&N, RAM AIR, PORTED PLENUM, B&M SHIFTER, 3.23 LIMITED SLIP, DUAL CATS, STOCK SUPER TURBO EXHAUST, COOPER COBRA XST's

MUSTANGS...ONLY 4 LUGS....HAHA THAT IS HILARIOUS.

 

A buddy of mine did this by elongating the center manifold bolt holes in the manifold.

I believe he was using the Vortec heads that required a different angle.

Sounds doable.

Jake

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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9

 

Yes you can elongate the center holes to fit. I did it on mine. Just make sure you use a little larger washer.

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D&Z Performance
"Putting Power to the Pavement"