Will '73 and up front springs bolt right on '72 and older???

[69BBsuburban]

Hey guys, quick question.....
I have a '69 'Burban that I'm going to lift. A freind has an '80 that's getting parted out with a 4" lift. Not alot of use on the lift(motor blew shortly after install)....

Will the front lift springs from the '80 swap right over??? Or are they the wrong width/center bolts different?
The truck isn't close by, otherwise I'd just go look and measure..

I plan on flipping the hangers in the back to lift the rear.

Thanks for any help!