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Hi everybody ! I have a Sunbird GT 92 and I have the #10048651 heads on the 3.1. I have read that the 91-94 engines normally have the #10087511 heads. So my question is did some 92 engines leave the factory with the 651 heads ? If no, what is the new comp.ratio of my engine with the small chamber heads? The only thing I know is that 2 pistons seized not too long after the original owner bought the car new .
Thank you
Seb
Thank you
Seb