1mm OS valves and radius valve job be worth it. Since the car's been apart, i've had the head milled .040" I'm trying to pick up another 10 - 15 at the wheels when i reassemble it. Thoughts comments?

 

I personally haven't seen gains before with O/S valves on Honda motors before. In a specific high output motor tough to say. But your everyday 180-220whp N/A B-Series motors, hasn't show much if any gains.

 

That's not going to happen, it isn't easy to make 10-15whp... If you're naturally aspirated you first need compression then a good combo of headwork and cams... Then you can expect some gains... Good Luck anywho... Peace