need help finding parts

i pulled a motor from a 87 celica gt on the motor it says 4age but every where i look on the web it says that the 4age motor is a 2.0 litr motor but on the head it says 1600 16 valve dosnt that mean that it is a 1.6 litr, it is going to go into my 85 mr2 that i just bought a week ago and thers no owner manual that i can get information from also it sucks to get parts were im at in germany little ass town called baumholder on an army base i gotta order parts off the internet but i cant find them, need a lot of help i want to upgrade as much of the motor as i can wile its out if any one could give me some help to find any parts that would hepl a ton

The 2.0L engine that came in the 1987 GT was a 3S-FE, not 4AGE. The 4AGE was 1.6L and came mostly in Corollas. Looks like a few came in Celicas.

http://www.users.bigpond.com/vidore/toyota_4age_engine.htm