Hi

I am new to the forum and joined because I'm in the process of installing a CrownVic IFS and air bags into my 1993 F150. While doing so it occurred to me, that while I'm at it i might as well swap out the rear suspension and get IRS/air bags too. Question is, what do I use? I heard that the Lincoln Mark VIII is a popular choice, but what else is out there that will fit and might be more adequate?
I'd like to hear your opinions, pros and cons and general advice.

TIA
--SMG