I tried re-mounting the engine mount. Takes the longest time because of work involving the original firewall, blind nuts etc.

Just shimming one side of the mount and forget about the clean lines. Fastest.

Replacing the engine mount with a slightly wider (adjustable) mount so that the engine can be turned a little bit.

If you really want to preserve the clean line matching and you are 100% sure that the side thrust adjustment is 100% correct., you may have to mix and match above.

I suggest you to go with the simplest and fastest way, because you may have to re-adjust the thrust.

This is why I use smaller diameter screws to mount some of the engines.

3mm screws on 4mm mounting lug holes etc.

Hope this helps,