Torque convertor and detonation

I'll say it again, torque convertor match aside... slow the curve so that full advance is a few hundred rpm later,aka less timing @2200 rpm.

The timing is the issue, regardless of if the convertor isnt just right... that fixing it would only be an indirect fix or by byproduct.. but it's only cause you would delay the full load to a higher rpm.

Making it way too hard...but if you really want to buy a convertor... go ahead. Please. Do that..THEN come back and ask about your tune issue.