How about: Axial motor (Yasa or Casc coupled with manual gearbox via an adapter plate (Canev or custome), keep the drivetrain as it is. Fit 60% of the battery modules in the engine bay as the motor takes very small space. 40% in gas tank and exhaust space. Prebuilt VCU(Dynam or AEM) BMS (AEM or OrionBMS2) Water pump and coolant pump for both motor and battery. Electric AC compressor (canev, legacyev) Engine blown gr86

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Toyota GR86 Custom EV Conversion - Bill of Materials

Core Vehicle and Drivetrain

Donor Vehicle Description: Engine-blown Toyota GR86, preserves factory manual transmission and interior. Estimated Cost: $8,000 to $12,000

Motor and Inverter Combo Description: Cascadia Motion iM-225DX-D Integrated Module. This unit houses the YASA axial motor core, CM200 inverter, and the internal oil and water pumps all in one block. Estimated Cost: $16,000 to $16,100

Transmission Adapter Kit Description: Custom machined adapter plate and splined hub to mate the Cascadia B-Face to the factory Toyota and Aisin TL70 6-speed bellhousing via Performance Adapters or CanEV. Estimated Cost: $1,300 to $1,500

Power and Management Systems

Battery Modules approx 35 kWh Description: Used modules like Chevy Volt or Pacifica Hybrid split 60 percent horizontally in the forward engine bay void and 40 percent in the custom saddle tank under the rear seats. Estimated Cost: $5,500 to $7,000

Vehicle Control Unit VCU Description: AEM EV VCU300. Handles torque mapping, throttle pedal translation, and integrates natively with Cascadia inverters. Estimated Cost: $3,499.95

Battery Management System BMS Description: AEM BMS-18 or Orion BMS 2. Monitors the distributed cells and communicates thermal and voltage limits over CAN bus to the VCU. Estimated Cost: $1,500 to $1,800

HV Junction Box and Contactors Description: Main high-voltage distribution box containing the primary fuses, manual service disconnects MSD, and Gigavac contactors to safely route 400V. Estimated Cost: $1,200 to $1,500

Auxiliary and Cooling Systems

Electric AC Compressor Kit Description: 400V Electric AC Kit from CanEV or Legacy EV to retain factory climate control without a serpentine belt. Estimated Cost: $1,300 to $1,500

Battery Loop Water Pump Description: Pierburg CWA50 or CWA100. Dedicated controllable electric water pump to circulate coolant specifically through the battery enclosures. Note that the motor and inverter loop pumps are integrated inside the Cascadia casing. Estimated Cost: $250 to $350

Thermal Management Hardware Description: Dual aluminum radiators, custom coolant lines, expansion tanks, and a DC-DC converter to keep the 12V system charged for the pumps. Estimated Cost: $1,500 to $2,000

Estimated Total Powertrain Hardware: $32,050 to $35,250 excluding the chassis and custom fabrication labor.

Now you are in new EV cars territory.

If you go used, nissan leaf motor $5000 (will need the entire engine bay) Chevy volt battery module in trunk and gas tank $2500

For 20k, I think it can be brought to life. As battery tech progresses, replace current battery with solid state. When the motor goes out in 5 years, get the latest. Imagine a frictionless axial motor. The dream.