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Ideally, you want the identical casting number stamped on the head.
Under the casting number is an "e" and a ratio (like 8.5 or 9.0). You would prefer a larger number (higher compression).
Lastly, there was a head gasket change at some point for the M130E motors. The EPC will tell you what the engine number cut-off is.
Having said that, you're head is NG? Any head you acquire will need to get new guides. You can't avoid replacing them. Most heads will also need to be milled flat. You would much prefer to do that to only one surface, not both.
Thx -CTH
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