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#1
12-28-2009, 10:59 PM
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Re: Can you help identify this Aluminum 427 engine?
Engine is a ZL-1 and the heads are for L88's and ZL-1's from what I could find on the internet....what are the dates on the block and heads?
Cool stuff! 
__________________
Bruce Choose Life-Donate! 
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#2
12-28-2009, 11:51 PM
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Re: Can you help identify this Aluminum 427 engine
Where is the date on the block?
I know he said the guy removed the VIN from the block and put his own number on it but I told my dad he might be able to do some kind or acid etching to bring the original # back.... Like the police do to get serial #s off guns that have been filed off. So it is a ZL-1 block, there were only like 70 of them made right?
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#3
12-29-2009, 01:47 AM
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Re: Can you help identify this Aluminum 427 engine
I think they were sold over the counter for a number of years. Maybe someone with more knowledge can help out...as the stuff I am finding is on the internet and easily accessible!
Here's one site: http://www.guinns-engineering.com/We...%20Casting.htm according to heartbeat city...the 1969 ZL-1 should have an intake p/n of 3933198... Where's Charley...or Stefano? 
__________________
Bruce Choose Life-Donate!
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#4
12-29-2009, 02:16 AM
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Re: Can you help identify this Aluminum 427 engine
The intake does not match the ZL-1, we know that. It is some high flow intake with rectangular ports.
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#5
12-29-2009, 03:01 AM
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Re: Can you help identify this Aluminum 427 engine
what is the casting number on the backside of the intake? You do have a factory intake there...the ZL1 intake will have numbers ending in 198 and is a rectangular port...the number you posted a picture of for the intake is the firing order.
__________________
I don't think it was coincidence that the Great Depression happened during Prohibition... 
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#6
12-29-2009, 03:57 AM
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Re: Can you help identify this Aluminum 427 engine
Soooooo, who is going to omment on the 074 heads on this engine? Acording to the people in the know on the L89 Nova thread they were totally wrong for THAT engine. This should be a 12.5:1 engine with these 074 heads?????
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#7
12-29-2009, 04:05 AM
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Re: Can you help identify this Aluminum 427 engine
074 heads are the only factory correct ZL1 heads...there is nothing wrong with those heads on this engine...yes, that is the correct advertised compression...
ZL1 = 427 cu in and L89 = 396 cu in....same stroke different bore, thus different pistons... Nathan...do you know how long that car has had the "stinger" hood on it?...
__________________
I don't think it was coincidence that the Great Depression happened during Prohibition...
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#8
12-29-2009, 04:01 AM
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Re: Can you help identify this Aluminum 427 engine
the 052 cast number means it was of the original design as opposed to a later GM block..there were many alum blocks made beside the original 'original' 69 that came in the cars...A few clues to look for. Does the block have screw-in freeze plugs..or press-in? Is there a small stamped 2 or digit number on the rear of the block in the center above the bell housing mounting flange..same number would be stamped on the main caps...a date code and small cast number may be located down on the side of the block near the motor mount area. Some of the known original ZL-1 blocks have the VIN stamped on the front pad and others have the VIN stamped down along side the oil filter. If it is one of the real blocks, you may have a small fortune there. Regardless, it is an awesome street motor!!! A few more pics may help. Good Luck.
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