Help! What's the deal with this brake booster on my 72 GMC?
Ordered a new brake booster for my 72 GMC 1/2 ton. See pictures attached. Bolt pattern on the old one looks to be 4", and the new one is 3 3/8". I don't see any options for different boosters to buy. Any idea why my old one has a different pattern? Thanks!
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1972 GMC Sierra Grande (current truck)
1980 Chevy Stepside (gone)
1987 Chevy Blazer (gone)
1972 Chevelle SS Convertible (gone)
1973 Chevy Corvette (gone)
1967 Chevy Camaro (STOLEN!)
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