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Topic: Big Block Intake Gaskets

in Forum: C3 Engines


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Big Block Intake Gaskets

Posted: 3/22/06 8:21am Message 1 of 5
RJKEELER
Former Member
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Oakton, VA - USA
Joined: 12/27/2005
Posts: 28
Vette(s): 1968 L-71 Coupe
Could someone tell me what the proper intake manifold gasket is for a 68 L71 427/435? Are the ports the round or the square special hi-performance parts? Thanks


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Big Block Intake Gaskets

Posted: 3/22/06 10:51am Message 2 of 5
huk_finn
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northern, IL - USA
Joined: 9/9/2005
Posts: 135
Vette(s): 1973 t top, 454, manual trans.
you should post the  intake manifold casting number, incase some previous owner reworked the engine/ changed heads and intake


Big Block Intake Gaskets

Posted: 3/22/06 11:10am Message 3 of 5
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Gunslinger
Former Member
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Frederick, MD - USA
Joined: 9/8/2003
Posts: 3398
Vette(s): 1969 convertible L71 427/435 4-speed black interior
If you have the 427/435 heads, the ports are rectangular. Oval ports are the more common variety that were used on the 427/390 and 427/400 and most of the 396 and 402 engines.


Big Block Intake Gaskets

Posted: 3/22/06 3:11pm Message 4 of 5
JacksL71
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sussex, NJ - USA
Joined: 11/15/2002
Posts: 299
Vette(s): 1969 L71 riverside gold convertible on frame restoration numbers matching motor 4:11 factory rear 4speed with hooker side pipes
gunslinger is correct, L71 heads are rectangular ports


Big Block Intake Gaskets

Posted: 3/22/06 7:42pm Message 5 of 5
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Yup....they should be square ports if L71/435.


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in Forum: C3 Engines


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