I run the little shop mfg on a 6.0 with AC. I'm not a huge fan of the way that it uses the alternator mount as a bolt hole. The issue is that the factory alternator bolt is shouldered. It actually broke the bolt that was supplied to use for the alternator bolt replacement which is not shouldered. This was during use. I tried to find a shouldered bolt that was long enough to replace it, but nowhere local had anything even close. I ended up trying to turn in a correct diameter bolt so there was no slop, but broke the aluminum accessories bracket due the bolt being a smidge too big. I freaked it until I realized here were accessory brackets for $20 on fleabay. Ordered one up and drilled out the mount to fit the bolt. No issues since.
Sorry for the ramble, I can get more detailed if you didn't understand.
Overall, the kit is nice and the 210 York is the bees knees. I haven't landed on a tank yet, though.