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PB vacuum hose size?

1K views 2 replies 2 participants last post by  enjenjo 
#1 ·
I am putting a street rod together and the fitting on the master cylinder booster is for 9/16 vacuum hose and the fitting on the engine is for 11/16 hose. I have a 11/6 fitting for the booster, does it make a difference? Or Should I change the engine fitting to 9/16 and run 9/16ths hose? The master is under the floor.
Thanks!
 
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