Re: head work
Yeh, If you look carefully at the left side valves and compare with the right side valves you'll see that they are at different angles. This is factory design compensation for offsetting the cylinder bores to the left of the crankshaft centerline.
To get equal compression ratios, you also need to cc the area in the block above the piston and in the valve area - needless to say, a tedious exercise.
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