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That looks like an early version sleeve. No pistonwindows or T-slot in sleeve. The case is late model for sure. Can you tell me the width of the boost port?
 
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That looks like an early version sleeve. No pistonwindows or T-slot in sleeve. The case is late model for sure. Can you tell me the width of the boost port?
Jon, that's a middle version sleeve. Not the original silver case sleeve. Some of those middle versions sleeves had boost port timing that is too low and should be corrected for best performance. All of the port widths in that sleeve are the same as the late modle T-slot sleeves.
 
Thanks for the info, Andy.

Still I great deal. I've bought many engines from Joe. Always a great deal. This one is the same. If I didn't already have 8ea MAC67's I'd jump on it.
 
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