not wure what you mean by water pump...you'll need a 302 one of course, and the hoses to connect to the rad and heater core. pretty straight forward. if the hoses on the rad and water pump are on opposite sides, then you can try a new rad, or longer hoses or hose and pipe routine (common on newer cars for heater core situations)

oil pan..I think most 302s are rear sump, but there are dual sump apps (crown vics?). crawl under you truck and see where the sump is - if it is a rear sump you should be fine with most any 302 pan.