Powertrain NVH and Powertrain Sound Quality requirements are among the key attributes to meet when developing new vehicles. Source-Path-Contribution (SPC) solutions are commonly used to support the vehicle design and development. They allow to quantify the relative contributions of the different excitation sources, whether airborne or structure-borne, and the transfer paths to the noise and vibration measured at the receiver locations. When performed in time domain, SPC analysis is also a very effective tool to evaluate interactively the powertrain Sound Quality and how it can be affected by design changes. In this paper, we will present a joint project performed by B&K Global Engineering Services together with Subaru where the team leveraged SPC models for powertrain noise of existing vehicles to create a new virtual vehicle assembly when the powertrain is installed in a different vehicle body. We will describe the process followed to perform such a virtual powertrain swap including a description of all the measurements performed on the baseline vehicles, the development of the SPC model for powertrain noise in time domain and how we switched the vehicle bodies. We will also present how the team used the NVH Simulator for the interactive evaluation of the new virtual vehicle.