The plug color is good and it is not pinging, I would ride it.

 

if you were to bring it to a real shop not a twinkie boteak - the first convasation would be well whats it have inside

compression / cam / stroke / ignition / voes switch / head work / milling all this is part of the equation -

if it came to us we would have to go looking IF - you dyno it with AFRs and it tracks correctly then put me in coach- DYNO IT and see what they say - you might be chasing your tail for nothing -- jz