I installed a Holley double pumper carb on my 350 Chevy, There was no vacuum

[captnrick]

port on the adaptor plate? I installed a Holley double pumper carb on my 350 Chevy, There was no vacuum port on the adaptor plate. There is a small vacuum port on the lower plate but I'm not sure it is large enough for the power assisted brakes. Any sugestions

 

[idontgivafork]

put a nipple into your intake manifold.

 

[kelly_f_1999]

if not you can also get vaccum thru intake theres a few plugs you can install a intake for hose

 

[Mikey]

The vacuum for the power brakes usually comes from a 3/8" vacuum port in the top of the intake manifold behind the carb. Check there for the port possibly with a pipe plug blocking it off.