Buy a nice ZR-1 with maybe 50K-75K miles in good condition but not worked on much. Then switch all you good stuff to that one. Then part out or sell what is left. You will at least know you are not giving away your improvements.
I had a disaster on a 90' (L98) and kept it for parts for a ZR-1......I then bought a nice ZR1 with some small issues (great price) that needed some of those parts. Made Lemonade out of Lemons as the say
Or......pull the engine and find out exactly what went wrong.....(130K miles is a bit of mileage) and if you have to start with a nice short block like
Pete suggests.