Engine Rebuild/Brake Booster

[Jonathan Sacks <jwsacks@xxxx>]

Hi all,

Slowly going about the business of eliminating reasons
for the "rough running" of my '66 300 (413) following
its recent engine rebuild. 

Theory I'm testing currently is a vacume loss throught
the power brake booster--a possibility first suggested
by club members. As I've said, it would make sense, as
I pulled the booster while the engine was out in order
to paint the engine compartment.

My question is...if I want to test the running of the
engine without the booster in the system, can't I just
close off the vacume line into the booster with my
thumb? Wouldn't that effectively seal the system, and
then if a vacume loss in the booster was the problem,
the engine should begin to run properly?

As always, thanks for the help,
Jonathan

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