Oh boy, you've got a plumbers nightmare is what you got especially given where you live.
Are you sure the current engine is a 350 and not a 305?
The LT1 is a strong engine but totally different from the GenI smallblocks like what you have.
If I were you I'd sell that LT and invest in some parts for your 350 if that's what you have. That will save a lot of headaches, eBay has zillions of parts and many will ship overseas. The first thing you need to do is identify the engine you have in your car now. A lot of those early 3rd gen Z28's had the 305,not a bad engine but not what I'd want to build given a 350 bolts right in. 350 heads in eBay Motors | eBay