I just completed a 1V-2V conversion on my 68 coupe with a late 70's head swap. I’m just trying to fine tune it. Any recommendations on what I should set the timing advance at???

 

I always set mine to the power curve. Advance it until it starts pinging under full throttle then back it off until it stops pinging under full throttle. You may have to back it off a little bit more if it starts hard.