Just strarting to put my 69 back together, and while installing the master cylinder/booster combo, I cant seem to recall which hole on the brake arm the pushrod connects to? The upper or the lower? The car was originally drum converted to disc if that helps any.(The conversion was done by the pervious owner) Any help is appreciated.

If you have power brakes, I would say, use the lower hole. Seems to me, you wouldn't need the leverage from the upper hole.

69er

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69 Camaro 454
71 Nova 454

If your not living on the edge then your taking up too much space

69er is right.

Power brake, lower hole.
Manual brake upper hole.
You have no choice, if you use the wrong hole it will break or wear out something very quickly.
If it works at all.
David