Let me adjust my comment, if you took the time and money to make the old Ford do everything a computer controlled 88 EFI engine does and maintained the full function of everything in the car to include the dash, ECM, A/C, etc, you'd be building something cool IMHO Valuable, probably not, but cool
However, slapping a carbed FE in an 88 shell would only be cool for a drag car, and then only if it ran hard
I don't know the market for a 88 Vette, but a little tweaking on a 383 or 406 with modern heads, it'd be a runner for cheap