The easiest way is using a Sawzall
Seriously, you have to unbolt the fenders, the inner fender, remove all the
stuff in the way, like radiator, deflector sheild (67/68 only) grill stuff, latch
unplug the headlights, the turn signals, remove wiring harness from to the
battery, gosh I think that's it, but not positive, might as well remove hood
and YES I would use a sawzall to cut the 2 mounting bolts to the frame if
they are old, it's like slicing fresh butter, and they need replacing anyways.