It's highly unlikely a 1990 Oldsmobile 98 Regency engine cradle subframe will fit a 1994 Oldsmobile Delta 88. While both are Oldsmobiles, there were significant design changes between those model years and across those models. The 98 Regency was a larger, more luxurious car, often with different chassis and suspension components compared to the Delta 88.
Even if some parts *looked* similar, the mounting points, dimensions, and overall design would likely be incompatible. Trying to force a fit could lead to serious safety issues. It's best to source a subframe specifically for a 1994 Delta 88.
