If you have A/C it is a pain in the ass. If not it is alot easier.
The nice thing about the 1969 The dash pad comes out with 12 screws.
Then the dash chunk comes out with 10 bolts and undoing the tail light harness and unscrewing the fuse box and poping the door light switches.
then the A/C unit is just sitting there. Takes a Saturday to do this though.