There should be NO contact between the engine and the body, or any other part of the running gear with the vehicle at rest, as there will always be a little movement of the drivetrain while in motion due to torque loading. Sometimes an engine/body/frame relationship looks good until a little torque is applied, and then something touches due to motor mount flex. This also applies to exhaust system components. You're going to need to re-engineer something, either sheet metal or motor mounts to provide adequate clearance not only while sitting still, but also some extra space to allow for torque. You'll experience a lot of vibration, and/or some loud banging, if anything gets together.
Jerry
