Most of your concerns for the 292 swap are minor and easily resolved except for the addition of the turbo. You will likely have to fab your exhaust and turbo mounting setup since the Chevy II engine compartment is very tight. And depending on your fab skills may not be a big deal for you anyway. Your oil pick-up mount may depend on how much you have to modify the oil pan to clear the crossmember, it could remain in its original location. This is one of those swaps that you need to mock up and check and re-check until you systematically eliminate all the issues, because some of them are contingent on other modifications and some are not. Good luck and keep us posted on your progress.
Here is also a more detailed parts list for a typical Chevy II/292 swap in case you haven't seen it.
HERE! 
