2 thoughts on C4's:
Last fall, I sold a '93 coupe/auto with 29,350 miles for a good friend of mine. He was the original owner. Always garaged, probably saw rain twice, blue tinted roof panel 3" cracked, ran good, a few paint chips, excellent beige leather interior with both power seats, Bose CD, tires original...maybe 5000 left. Oh yeah, color was white. Sold for $17,500. Point being a price comparo with your potential '92.
1992 was the first year for the LT1.. I think that was port fuel injection rather than sequential fuel injection. Check this as sequential is the way to go. Maybe the guru's here can help, I may be confused with '92/'93 Z28's.
Regardless, parts are EXPENSIVE for corvettes as you are noticing. Bear it in mind as the insurance may be cheap/reasonable but that's only part of the story. ZZZ.