Want to use a Gen 2 transaxle in my VW Kombi upgrade

I have the ex taxi '08 Gen 2 with 750,000 kms on it (at least) and I'm thinking seriously of using this to repower my '74 Kombi, replacing the 4 sp gearbox and ICE.

I'm planning on adding the Zombie Inverter board to the Gen 2 inverter and bypassing the buck/boost converter, feeding directly into the inverter input. This should allow me to run the 51kwh LFP battery from the MG4, or the 64kwh NMC battery from the other MG4, both of which are in my workshop yard at the moment.

Johu on the Open Inverter forum says they don't have much torque or power, but running off the NiMh battery and the 40Ah LFP battery for the extended range in my '06 Prius, drove ok as electric only, up to 80km/h.
With MG1 being driven as well as MG2 and the 400vdc MG4 battery, what do members here think, would it be enough power to drive a '74 VW Kombi?

T1 Terry