Good news!!!! Got old heater core out, new heater core in!
Couple problems why it wasnt coming out:
1. The debree trap in the plenum had to come out, it was attached by a glued in
i had to pry it off
2. A reason the metal frame wasnt pulling out that far was i forgot to unclip the
fuse box, and it was hitting the paneling around the edges of the door.
3. Took off the bottom half of the heater box where it connects to the air vents
going to the back seat.
those metal clips holding the two halves of the heater box assembly together are a REAL PAIN esp the ones in the back, i hate those things