I need to figure out if the door windows are the same between 1974-76 model ad 77-78 model. I know the doors and mechanism are completely different.

 

From the parts manual:

13 GLASS-DOOR WINDOW RH   80311-E4101     - 7506 1   80311-N4500   7507 - 7607 1   80312-N4400   7608 -   1   14 GLASS-DOOR WINDOW LH   80312-E4101     - 7506 1   80312-N4500   7507 - 7607 1   80313-N4400   7608 -   1

 

From that I would say that they are different parts.

From the parts manual:

13 GLASS-DOOR WINDOW RH   80311-E4101     - 7506 1   80311-N4500   7507 - 7607 1   80312-N4400   7608 -   1   14 GLASS-DOOR WINDOW LH   80312-E4101     - 7506 1   80312-N4500   7507 - 7607 1   80313-N4400   7608 -   1

 

From that I would say that they are different parts.

I know that there are Clear glass ones and blue glass ones.

 

I am looking for brand new ones for 1977-1978 2+2. And I found ones for 1974-5.

 

I know regulators are different between early type and later type.

You should have said 2+2 from the beginning.

It looks like they changed after the 75 model year, as well.

GLASS DOOR WINDOW RH
80312-N3700             - 7506 1
80312-N4520   7507 -           1
 
GLASS DOOR WINDOW LH
80313-N3700             - 7506 1
80313-N4520   7507 -           1

You should have said 2+2 from the beginning.

It looks like they changed after the 75 model year, as well.

GLASS DOOR WINDOW RH

80312-N3700             - 7506 1

80312-N4520   7507 -           1

 

GLASS DOOR WINDOW LH

80313-N3700             - 7506 1

80313-N4520   7507 -           1

Thank you. But my question is are the glasses different shape at the bottom? Could early ones be fitted on later ones? I am looking for new ones for 77-78 2+2.