I've owned the Pro4, EVO IV, & EVO V, but I didn't try to fit any of the EVO's bulkheads onto the Pro4. I don't think it would really fit correctly. I'm pretty sure the mounting holes are very different as the pattern itself isn't the same. Then, the next issue would be if the measurements of the drivetrain would fit. I think you should either buy an EVO V or try to fit the Pro4 suspension onto the EVO V. That may be easier to do.