For that small amount of seepage, it's not urgent. Good that you have identified it, but, how do the doctors say it? "Continue to monitor." :)

vacuum pump
 

thanks NGOMA for your comments its measured me that its not to bad then
regards jim

vacuum pump leak fixed
 

hi all just a update on my jobs. i removed vacuum pump as to your instructions cleaned the mateing surfaces dry fitted another gasket and put a small layer of hylomar blue sealant around the outer edges .all bolted up well since the job been done there is no sign of oil misting or on the head gasket joint below pump for last 3 weeks so hopefully a nice dry engine for now thanks again for all your input , regards jim

vacuum pump leak fixed
 

hi all i think i have fixed the leaking vacuum pump ,i have put the genuine pierburg pump on from the donner car i have. ive done about 100 miles so far everything is dry .
if anyone fits a febi pump you will need the genuine febi rubber gasket.
my thoughts only as i never got one

Interesting problem, glad you fixed it. Thanks for the update. :)