Yeah, it's not a fun job. I had the radiator and fans out of my International when I changed mine out. It was alot easier as I used a really long extension and just went thru the rad support and lower bumper opening to get access to the bolts.
The later LQ1's starting in 96 I believe moved the packs and module up topside. Much nicer.
Again, those packs with the white numbered firing order are unobtainable now. It took me a very long time to find an NOS set.