Will a 4.9 Liter Cadillac engine fit 1990 Seville?

A 4.9-liter Cadillac engine can fit in a 1990 Cadillac Seville, as the Seville was originally offered with this engine during its production. However, proper installation may require modifications to ensure compatibility with the vehicle's existing systems, such as the transmission and wiring. It's advisable to consult with a mechanic or professional familiar with Cadillac models to ensure a smooth installation process.