Hoping its pretty reliable.. i won't know that for a year I suppose.. but I would expect it to be reliable I couldn't see why not. I'm sure ill destroy My rear diff but thats me, not the engine setup.. then it'll be time for a 9.. I did remove the engine, but I wanted to clean My bay, and new oil pump and oil pan gasket and rear main... So i just figured yank it, it was more work but I painted the block and found a wire worn through, and got 15 years of gunk cleaned. Could have easily done heads n cam with it in the car, with rad/condensorremoved. once you get enough room to stand in the bay its not hard to work on. As for bearings, mine Were all in good shape, My car only has 59k so I didnt replace but IDE say that's personal preferance and milage and condition. . As for headers.. gotta have the engine in and rock engine one side at a time. Driver side in from top, pass in from bottom.. hope i amswereed everything.