65' stepside Air ride help?!

[Dwolfe]

Hey everyone i'm sure there are awesome air ride threads out there but I wanted some questions answered specifically to my truck. I traded for the truck with all this done so far, drop spindles in the front w/disc, and notch in the rear. I don't know how much of drop spindle it is or were it's from. but its decently low. I'm going full air ride and want to get as low as possible( although laying frame is not necessary). I so far, I'm going to be doing a triangulated 4 link, ( my truck is leaf)
under axle bag mounts.
So my questions are :

Is my notch tall enough to get as low as possible? or should I make it taller?

Should I fabricate a rear crossmember for the 4 link to mount too and for more clearance for the drive shaft?

Also were should i relocate new shock mounts too?

and the final big question, is it worth the headache of z ing the front frame? , how much to make it worth it? and what all then needs to be modified to make it work?

Hope this isn't too much just have lots of questions!