Saw others convert to rear motor with the Slot It inline pod, so I just got on to it.
Measured, temporarily positioned the new motor pod, drilled pod holes and then cut the chassis with a Dremel razor blade.

Played with different height spacers between the chassis and pod to get the desired wheel height. Used Slot It parts for the rest of the drivetrain - 25k motor, 9t pinion, 28t crown and 17 in. rims all around.
Salvaged the instrument panel, headrest, driver figure and steering wheel from the original full interior tray but obviously just a flat tray would do now.

Also, could now install single front axle rather than stubs which I prefer.
Turned out well.

Set the body loose on all four mounting screws and it runs just great on my twisty wood track. No need for additional weight.
Glad I got this going after sitting in the project box for years.
Dan