[Tigers] Servo and F4B maniforld

[Rollright at aol.com]

Hello,
 
In preparation of re-installing a rebuilt servo, I looked at my  original 
iron 2 bbl. manifold sitting on a bench, and spotted  where  the vacuum 
fitting is located.
 
Under the hood of my Mk 1A is an Edelbrock F4B. It appears that the  
attachment point for vacuum is at the rear end of the manifold, not  pointing up 
but pointing towards the firewall.
 
Does anyone know if this is correct? And is the fitting the same diameter  
and thread as the original manifold?
 
Seasons greetings to all,  

Jim  Armstrong
Mk 1A  
382002083
LRXFE