Best Way to Install Engine, Trans & Transfer Case (Bare Frame)??

[Rack Man]

Newb....with another basic question!

I'm getting my frame back from powder coating this weekend and will begin the re-assembly process of the chassis and driveline....I'm just wondering what is the best (easiest) way to re-install the engine, trans and transfer case..??

Should I hook it all together on the ground and than simply cherry pick it in as one unit?....or should I install just the engine first....then the trans & X-case as a seperate unit.....or all three pieces installed individually?

Any help would be appreciated?

Thanks, Dan