Take a pry bar and see if you can pry the lower control arms rearward on the pin at the bushing with the swivel strut rods you have. You may have to remove the stabilizer end link on 73 up 340 suspension. You don't have to on the 72 and earlier
I would say the washers you received with the torsion bars may go behind the bar in front of the clip to prevent the bars from siding back and hold the arms on.
Just my advise do what ever you want. I have just seen a car with a destroyed fender and valance due to this.