[Burt4x4]

What I did is upgrade my booster to 1ton.
1/2ton truck have a single diaphram booster were 1ton uses a double.
WOW! I can actualyl lock up my 35" swampers now. HUGE improvement.
Simply when to Autozone (they carry AC Delco) and ordered a Master/Booster set for a 1972 K30 1ton 4x4 p/u.
My brake are better than ever!
Burt