What kind of fluids to I use??????????

Hey, can anyone tell me what automatic trans. fluid to use in a 73 Dodge charger with a 904 trans. and a 318 engine. The service manual just says Dexron ATF, but when I go to the auto store they only have Dexron II, or III. does that matter?
Also the manual doesnt say what kind of power steering fluid to use, it just gives me a part # 2084329?
And I dont see anything regarding what kind of brake fluid to use.
:confused:
Any help would be greatly appreciated! Thanks!
Author: sm73charger