Hello all, first let me introduce my self, I a mechanical engineer, my interest in the VW began with mi first real job, working in the purchasing department in Puebla's VW plant.
And after a little more than 15 years I finally got in, I just purchased one 1600 engine, that has seen better days, my plan is to us it as a learning tool for the future purchase of a complete beetle

The marking on the case are:
MEXICO AS 41
3 M VW 043 101 102 A
MEXICO AS 41
2 M VW 043 101 101 A
As you can see in the pics the tear down has began.

What should I look for?
Thanks all for your help