Are 88 5.0 Motors Same As 91 Motors? Mines different

[SiK91LX]

The ac/alternator brackets are totally different.. The pullies are different...Also the power steering pump are different also... Is this right?

 

[bmorrisj]

could be a difference between dealer installed A/C and factory A/C?

 

[TheUser]

could you get some pics? Maybe it's a 5.0 from a Lincoln or something? Are they different?