k frame issues

i have a 74 dart..slt 6 drum brakes...Ive built a e58 360 to go in it..also have a k frame and disc brake set up off a 72 duster minus the steering box and center link..i order a pittman arm,idler arm and all tie rod ends for a 72 duster...i have a mess...the pittman arm doesnt fit the manual box off the 74 dart right...the slant 6 center link isnt right...any good advice will be appreciated...someone said the pittman and idler arm studs face up?..on the slant 6 they pointed down...thanks for info guys