Cost to install power brake booster

If you check your M/Cyls bore size,, if it's 1 inch or bigger,, you could achieve an easier pedal by going down to a 7/8 or 15/16 master cyl,, which'll give you more "leverage", for less effort,, and better feel,,

Rock Auto has them..

RAYBESTOS Part # MC36406 More Info {Professional Grade; Bore Size=15/16" Number of Ports=2 Primary Outlet Size=9/16x20 Secondary Outlet Size=1/2x20}
Front Disc Brakes; Rear Drum Brakes;

http://www.rockauto.com/catalog/more...117&cc=1088760

Your push rod should be fine...

hope it helps