whats the difference between the LS1 and 5.3(LM7) accessory brackets???

I may have found an LS1 from an 02 Z28 for my 98 Tahoe. I have the Lextech A/C kit which I just realized wont work with the LS1 brackets. Question is, what do I need to buy, besides new brackets, in order to get the LS1 to look like the 5.3 so that I can run my A/C and alternator in the trucks original location??

Please tell me that the water pump. PS pump, and tensioner are the same on these two engines

I think you need a different water pump and under drive puller. Power steering pump should be fine with the 5.3l bracket setup and I believe the tensioner is the same.