New Pitman Arm Help Please

sorry to start this up again but need help... I bought a 65 barracuda that has a 360 in it... the pitman arm hits the starter. The left motor mount was bad, the steering was very loose and ball joints were bad so i ordered motor mounts, ball joints, pitman arm, idler arm, tie rods and ends. The new pitman arm is bigger than the old one and will not work it hits the starter, and the header. The lower ball joint holes do not line up with the holes in the spindle, they are off by about 3/4 inch. The car was changed over to disc brakes and im thinking that the spindle's were changed to a later model i have new ball joints coming, but the pitman arm i am lost on PLEASE HELP!