If it was inverse, JFK-SFO-SYD, yes as you would be bussed from domestic to Intl
But here is the breakdown for you
+10 mins late as usual for SFO to get to the gate (weather, you name it, any excuse)
+5 mins to get out of the plane
+15 mins to clear immigration if peak times may be as high as 40 mins or as low as 5... So 15 mins avg
+20 mins to wait on bags... No such thing as priority bags
+5 mins to customs
+5 mins to walk to domestic
+10 mins to clear domestic security
+10 mins to walk to your JFK flight (gates in the 80's area or so)
This is 1hr 20 already.... If everything goes smooth you can do it in 35 mins - but even with NO checked bags and short waits at immigrations it's taken me more time... I wouldn't risk it. I would change your connection to something longer
BTW: The bus mentioned before is only from domestic to international. As it is considered domestic pax have cleared a form of TSA proved security. On intl arrivals you will ALWAYS have to go through security, hence no need to run a bus as you need to go through domestic security anyway
[This message has been edited by NickP 1K (edited 08-17-2002).]