The easiest way to verify Cam timing and belt tension.
1)Remove the upper cover and measuring around the top from bolt tab to bolt tab get a total reading then divide by 2 and mark that spot on the cover.
This will be 12 o'clock center of the timing cover which is also 12 o'clock center of the head.
2)Remove the spark plugs and rotate the crankshaft by hand clockwise until #1 cylinder is at TDC on a compression stroke.
3)Verify TDC by being sure the timing mark on the flywheel/torque converter is aligned with 0 on the timing plate.
4)The slot in the cam sprocket should be aligned with the mark you made on the timing cover in step #1.
5)The distributor rotor should be aligned with #1 cylinder on the distributor cap.
6)Realign marks and retension belt as needed.
7)Rotate the crankshaft 2 revolutions by hand bring #1 back to TDC as in steps 2/3 and recheck mark alignment.
8)If correct you can start the car before installing all of the removed parts to verify tension is correct as long as all electrical components and vacuum lines are connected.
A properly tensioned belt will ride in the center of the cam sprocket.
If it rides to the outside the belt is too tight.
If it rides to the inside the belt is too loose