Numbers Stamped On T50 Gearbox

[grumpy69]

Gday rollaclub crew

I'm new to corollas and rollaclub but doing a 4age ke10 conversion and have two different t50 gearboxes and wandering what the numbers stamped on them mean. they have factory stamps in the cast but also have numbers which look like they have been hand stamped. the first one has 3-2 on b/housing and ex/housing it also has hand stamped numbers on the under side 21 spline input and 20 spline output. the other has 2-2 on b/housing and ex/housing 7-1 in the centre section on drivers side and 11-1 in centre section on passengers side it also has hand stamped numbers on several places top and bottom of gearbox and 21 spline input and 21 spline output. if anybody could help me out with some answers that would be really cool thanks heaps

Josh [grumpy69]