Re: EAB Heads & their Piston Reliefs - Is this right?
If I understand your dimensions it is perfectly normal after truing a head to have the center domes larger. This is because the heads "warp" with the center lower than the ends when viewed with the gasket face up. The machinist probably leveled the head to the best possible condition and removed the minimum material which resulted in more surface thickness removed at each end.
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