72 duster 360 NA to 390 Turbo

Glad you made it out to the track! What gears are in your car? Are those untouched magnum heads(besides valve train)?
Thanks turbovan!
3:23 gears 275/60/15 drag radials and heads are gasket matched to the intake. Has cometic headgaskets.
While I have improved the 60ft quite a bit by experimenting with launch RPM, I’m gonna install a 2 step and see if we can improve. I feel confident the converter is holding me back. It’s a ACC boss Hogg 3200.