For improved brake feel, try installing a master cylinder Support/Stopper.. It will help eliminate the flex at the firewall which results in a spongy like feel at the pedal
The trick is to get your 60' times down first. Adding NOS means SFA if you spin you wheels like crazy comming out of the hole.
Have a look at all the guys who have done it and pay attention to there 60's
the thurust bearing is part of the clutch kit.. It is used to release the clutch pressure plate when you push the pedal down... You would normally replace it when you do your clutch