Rear shocks? Air or coil over?

I'm having to buy new rear shocks for my 74 Duster. My old Krusty air shocks finally blew out. I liked the fact that I could pumped them up to get some more height in the rear and has me wanting to buy air again But I see the Monroe sensatrac with coil overs has me wondering if I can get the height without the air shocks.

Has anyone tried the coil overs and gotten some added height? And what do you prefer?