Power Brake Booster

67P51

New Member
May 2, 2005
29
0
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This may be a stupid question, but....
On my brake booster(68 power discs) there are 2 nipples on the vac line fitting. The big one I know goes to the engine to supply vac. I have had the other capped off. Just saw a photo of Great 68's engine bay and it looks like he does not have small nipple capped. Am I missing something?
 
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