Need help with new A/C compressor kit

[Windowlicker]

I'm replacing my A/C compressor and drier on my 98 explorer SOHC. I ordered a "kit" online that came with everything including gaskets and oil. Just recieved it today and opened it up...and some things are a little confusing. First off I don't think I got the right A/C compressor.
The first link is the compressor I thought I was getting and is the one that's on my explorer now. The second link is of the one I got in the kit...and it looks like it's for a V8.
Link #1
http://www.autozone.com/autozone/parts/Compressor-Works-A-C-Compressor/1998-Ford-Explorer-4WD/_/N-j9tp9Z91sgi?counter=0&filterByKeyWord=a%2Fc+compressor&fromString=search&itemIdentifier=58367_144919_3513_
Link #2
http://www.autozone.com/autozone/parts/Compressor-Works-A-C-Compressor/1998-Ford-Explorer-2WD/_/N-j9tmjZ91sgi?counter=0&filterByKeyWord=a%2Fc+compressor&fromString=search&itemIdentifier=261774_144919_3513_
So naturally my first question is are they interchangable? I went back and double checked my order and it said the kit was for 98-03 v6 explorers and rangers so...?

Another thing I'm a little confused about it the PAG oil. With these explorers I was under the impression that you put 4 OZ in the compressor and 4 OZ in the drier. But, there's manufactor's sticker on the compressor that says the comressor already contains 7 OZ of PAG oil and that I may need to add more if I have rear A/C, which I do.
Then the instructions that came with it (written by the business that sells the kit) said I should dump it all out and just use the oil that that was sent in the kit, with was 8 OZ worth. So what should I do about this oil thing? Add more ? Dump it out? No clue at this point, just don't wanna break anything.

 

[blazin8556]

the second link told me it would not fit. the only difference i see tho is a 2 wheel drive and 4 wheel drive in the drop down menu. and obviously part numbers are different. i would dump out the oil like it says and split the oil between the compressor and the drier

 

[blazin8556]

looks like the clutches and pullys are different. there is no rear view of the second. but i think it is for a v8 as well. might put everything back into the box and take it back and order everything individually. the compressor looks alot like the one on my v8.