All traditional Fender inline headstocks are straight. A few Fender Japan 2+2 headstocks were angled, but the inline headstocks are straight.
Make sure when setting up new strings that you don't cut them too short. You need to allow about 3 windings all the way around the machine head string peg to generate the pressure on the E and A strings. 2 trips around the peg are enough for the D & G because of the string "tree" retainer.
Setting strings up like this I have gotten enough of an angle on every Fender Bass I ever used.