alternative to the Fox is the Kitten
these are much easier to find but you need to be careful to check
the condition of the chassis, they are prone to rust on the top surface
where to body sits on them.
They can be repaired, but it's not ideal.
The back axle ratio was 3.2 :1.
It will be too high to run anything other than 12" wheels.
A replacement diff is available from us
(5:1), but the additional costs are better spent on a fox!