Yes, it is very much possible to upgrade from V6 to V8 if you feel that’s best for your driving style. The process will include modifying components such as the fuel tank, regulator, and other important ones. Similarly, you can swap a V8 engine for a V6 engine if that’s preferable for your driving style. The cost for this is roughly $5,000 to $12,000. Learn about the cost of an engine swap.