New Owner, Transmission swap

Like I said earlier, on the street, our cars are 2 gears to 60mph, at WOT.
It doesn't matter if Manual or Automatic, it's still two gears. and one shift.

However the automatic has an infinitely variable hydraulic gear ratio inside it that at WOT varies somewhere between 1.8>1.1 depending on the input torque to output resistance. That is really, almost exactly like an automatically shifting full gear ratio; so really, from a dead stop, a 3-speed auto is performing like a 4-speed auto.
and from a dead-stop, stall-speed is acting like clutch.
If you match your engine to this powertrain, and you have adequate traction ..... a streeter with an automatic is hard to beat . If you match that to the governor system, and a shift-kit, and just leave it in Drive, it will or could be deadly repeatable.