There is no slide play in the mounts, the sides of the mounts are already touching the inside of the compartment. And if I could slide the mount over it would move the centermarks of the mounts so they would no longer be centered.

It is not the mount that is crooked, as I stated the engine is straight, it is the cowl ring that is off-center. And by shifting the cowl 1/8" to the right should center it. That is what I will try.

I really appreciate all the advice given here as I always do but I think I am confusing you all by making you think it is the mount/engine that is crooked.