Mine was a kit from CPP. It came pre-assembled with bracket, booster, master cylinder and prop valve, and push rod. I had to modify the pushrod a bit to get the correct length and made a new hole in the pedal arm to mount the pushrod to. I also had to add two additional holes to the firewall to mount the bracket.
My rebuilt, stockish 402 big block pulls plenty of vacuum at idle so the vacuum diaphragm booster works well for me.
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Jason M. @argonaut62
1972 K5 Blazer CST,
Turquoise
1966 K20 Short Fleet Pickup,
Big Ugly
1964 C10 Short Fleet, Gertrude
2001 Porsche 911 Carrera
1996 Ford Bronco XLT
1980 Jeep Wagoneer
2008 Honda CBR1000RR
2005 Honda RC51
1981 Honda CB750C
No dis-assemble Johnny Five! No dis-assemble!