Product Description
The Toploader tranny, introduced in 1963, got its name from the ability to quickly change gears through the top of the case. Similar to a quick-change rear end.
This is a new resin item cast from a 3D-printed master.
Use a Hurst shifter set for this transmission found here.
Here's a photo of the real tranny.

Resin transmission, by Futurattraction, 1/25 scale.