Not that hard to do, the hardest was the cleaning up the area from carbon when you take it apart to replace the fuel injector system. Here is a link that will help you understand the parts that needs to be removed. Good luck and feel free at ask any more questions.
The better lower intake gaskets to use for the 92 thru 95 CPI "W" engine, it's the Felpro part# MS93346-1 because they have the rear coolant passages blocked off and they have the same size intake runner ports as the felpro MS95832, so this makes the MS93346-1 ideal for the CPI "W" engines.
There is 2 Felpro intake gaskets out there. One is part#MS95832 which is what the book calls for 1992-1995 4x4 S10 Vortec CPI "W" engine, and the other is Felpro part# MS93346-1 which is for the other "Z" motor which happens to be the same gasket excepet for that the rear coolant passage is blocked off. Since the lower intake has that rear passage blocked off anyway why not use the "Z" gasket instead with the passage blocked off so that the coolant doesnt touch the aluminun there, like the open gasket would.