I am looking at upgrading a 1969 fj40 to a better brake booster because of a newly installed disk brake front end. I have these two styles of boosters and was wondering which one would be best for my application. I may eventually put disk brakes on the rear down the road. I picked up the #1 booster from a friend and do not know what year truck it is from, if anyone can tell me that would be greatly appreciated. It is slightly different then the 1980 to 1990 model shown in specters catalog, but could be just the same one, with a few changes made during production. Also if anyone has a adapter to fit a late model booster to the 1969 I am in the market for one.
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