If I take my disc brake sub frame and in stall it in my buddys 69 using a 69 power brake set up bosster, master cyl, prop valve etc (his is a drum brake and twisted) what am I forgeting or is this all to install power front discs?

sounds like you have it all...don't forget the rod for the break pedel,and to put it in the correct hole for power breaks.

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My '68 Camaro (http://hometown.aol.com/Dougs68Camaro/index.html)
Doug G.
68 Camaro
406 ci.

Also, might as well change the brake line brackets, too. They're unique to the disc brake, but the drum brake brackets will "work"