Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#1
12-03-2005, 05:49 AM
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Re: 427 Rebuild
The L-89's all had closed chamber and L-88 vetts had closed chamber till around serial # 21,000-22,000 of the 69 model year. Then they went to the open design.
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#3
12-06-2005, 02:02 AM
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Re: 427 Rebuild
Hello All,
I have a .030 427 990 Rec heads, ZL1 intake 198 .500 TRW dome pistons set .010 in the hole and Run a custom ground Hyd Flat tappet cam. Ran 12.50's @ 110 on 255.65 15 BF goodrich radial street tires not the stickeys! I would go with a Hyd flat tappet. 427 will run strong either way! I use Sunoco ultra 94 and have no problems! It's a true 11.2 comp also! Good luck! 
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COPOJOE 427
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#4
12-06-2005, 02:03 AM
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Re: 427 Rebuild
Hello All,
I have a .030 427 990 Rec heads, ZL1 intake 198 .500 TRW dome pistons set .010 in the hole and Run a custom ground Hyd Flat tappet cam. Ran 12.50's @ 110 on 255.65 15 BF goodrich radial street tires! I would go with a Hyd flat tappet. 427 will run strong either way! I use Sunoco ultra 94 and have no problems! It's a true 11.2 comp also! Good luck!
__________________
COPOJOE 427
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