got a 75 nova few weeks back and had to get this stuff done there. costed a bit of money but in the end the drives perfect.

 

I did my 69, same thing. Two man job. Install the rear perches first, they have some play and you can move foreward and back if necessary. Have the guy in back jack up the rear end and push forward at same time as you line up the holes in the front cups to the body and install the bolts.