2.5ft gauge

Dear Friends,
I'm trying to help the people of 2.1/2 ft gauge at São João del Rei in Brazil, to find some basic dimensions lost due to the absence of technical people working there.
They needed the following dimensions in order to restore his locomotive and car fleet:
back to back dimension mounting wheelset,
the wheel profile, new dimensions an wear limits condemning (I believe they used originally AAR narrow flange)
the side bearings clearance, for passenger and freight cars.

Some help will be very welcome.

If someone has some erecting card of some locomotive built for São João del Rei Ry, please let me known.

Tanks a lot,

Sergio Romano