As far as the ignition timing goes, the sticker in the car states 12 degrees advance stock. Mine is at 17 degrees, so would I be gaining power or losing it at 17 degrees advance?

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual