I have a 78 280 Z that I have done extensive work on. I want to find a mechanic with Z car experience to check the engine with a computer analysis to fine tune the new engine performance. Does anyone have a recommendation. I live in the Tacoma area, but will travel to farther locations if necessary.

Have you installed a standalone EFI unit? Or are you running stock(perhaps refreshed) EFI?

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Verify the timing & take it to a dyno.   There is a shop with one in Bremerton.