Master cylinder bore size

AdamH

Scrambler Junkie
LIFETIME
CJ-8.com Member
City
Mt Holly
State
NC
#1
Going to upgrade my brake booster/master cylinder set-up with a Master Power Brakes unit. They have two option on bore size - either 1” or 1 1/8”. Which should I go with? Everything else on my ‘81 is new however stock replacements
 
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