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looking for some help with recent brake dramas

i decided to shorten the aluminium spacer rod in the MC to see how it goes, which let me bolt the MC upto the booster without it pressing up against the booster, (wilwood also confiirmed that 1/16 gap should be between the booster rod and mc piston)
i then rebled the brakes ALOT of air came out which was expected, then i took it for a drive and pedal was very stiff and still had to put my whole body weight on it to pull up, it is as if not enough vacuum, which could be right.

i am just taking a stab here but i did add 2" carb spacers to my dual quads and about that time my brakes started playing up, would a spacer reduce my vacuum? i do have a very big cam and i know i would not get full vacuum, but maybe this is my problem?
 
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