The first thing you need to do is find out if all cylinders are sealing, and the cranking compression. If the cranking compression is even, follow with a leak down test. You want good ring seal or all else is a waste of time.
Theses steps well tell the story of roughly where the cam is, and if the wiped lobes took out the rings.
Next, find a way to check the air fuel ratio. You need to know if you are anywhere close. Jet as needed.
I highly recommend a chassis dyno session to be certain your ignition and fuel ratio get dialed in and have no problems.
Next, test the converter to see just how high it will flash once the motor is up and running strong. If your converter will flash past torque peak, the gears will have significantly less impact. If you have too little stall, they will kill you.
Too little stall to me with this combo would mean anything less than about 4400+ rpm.
If you get stuck anywhere along the line diagnosing this, just stay at looking for a way to get the info you need. Without doing this step by step, you are just stabbing in the dark.