Some "Y's" had dual action fuel pumps, one side for fuel & the other vacuum for wipers etc.  Does anyone know how much vacuum a new or rebuilt pump of this design could pull?  I was thinking if it could pull enough vacuum I could use one for a new vacuum/power assisted brakes system.  I have not installed my new engine yet but with it's cam specs of .450" lift (with 1.5:1 rockers) 288* adv. dur. and 238* @ .050 with 112* lobe centers the engine may not make enough vacuum required for the brakes.

Your help would be appreciated.  Thanks!

   

1956 F100 Big Window 309ci Y-block,  1956 F100 small window 272ci Y-block

Greg.  Mountains of North Eastern CA