I have a really hard time keeping my engine attached to my rally car. I finally got mounts that were strong enough from AKG Motorsport, but then I started snapping the aluminum engine arms that hold the rubber mounts. So I made a jig from an aluminum one so I could fab up a steel arm. 
Haven’t broken a motor free since installing the steel arm! I know have Jigs for S14s and M50/S50/S52 engines if anyone else if having a similar problem. But if you need a passenger arm for a S50 motor, the steel turbo arm from Rally Road will work too. If you really jump the car you will need both sides made of steel.
