LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Are 93-97 Cylinder Heads the same?

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Old Mar 27, 2003 | 03:42 PM
  #1  
Wild1's Avatar
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From: Orange Kounty, Kalifornia
Are 93-97 Cylinder Heads the same?

I've got a 95 Z28, but I may be able to get some 93 Z28 heads or 97 SS heads... Are they interchangeable? I'd like to get them ported and polished...
Old Mar 27, 2003 | 03:52 PM
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From: Gordonsville,New Brunswick,Canada
Re: Are 93-97 Cylinder Heads the same?

Originally posted by Wild1
I've got a 95 Z28, but I may be able to get some 93 Z28 heads or 97 SS heads... Are they interchangeable? I'd like to get them ported and polished...
Yes they are all interchangeable.
Old Mar 27, 2003 | 03:57 PM
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They are interchangeable but arent some of the heads 561's? I heard non-561's have more meat to them for porting. Correct me if I'm wrong please.

Dan
Old Mar 27, 2003 | 04:19 PM
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From: Kingfisher,Oklahoma
I actually have a set of both setting on my floor right now. The 93s are ported so I really cant compare port size and all but the 97s do seem to have a little more beef to em.
Old Mar 27, 2003 | 04:31 PM
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some 96 and 97 heads have the 561 casting which have thinner ports but flow better than the standard 643 casting on 93-97. I believe there were 4 different castings but 643 and 561 are the popular ones...
Old Mar 27, 2003 | 05:45 PM
  #6  
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Great, I'll be going into the heads this weekend! Where are the numbers? Is it part of a string of numbers? Or are they stand alone?
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