I just bought a 65 mustang with a 351w, I was wondering wherein the enginebay is reservior foradding poower steering fluid. Thanks.

are you sure you HAVE power steering? If you do, you take off the cap/dipstick from HERE: (the power steering pump)

If you are having a hard time steering and dont know where to fill it... you might now have power steering...

http://img529.imageshack.us/img529/7500/img4166mb4.jpg

if theres no big pump with a pully and a belt on it then you dont have power steering. if thats too confusing then look underneath the car, if there a cylindrical shock, then you have power steering. if theres not, then no PS.