I tried quite hard to mount the alternator on the OS of the car, modifying the original mount. But I’ve actually mounted the engine so low in the chassis that the alternator fouled – so I had to come up with a neat custom solution:

Obviously some of what I am doing is inspired by “Hilly’s” Lotus that you can find on motorgeek – esp using the 01x and Audi V8 motors together – and in this case, had to switch the alternator to a NS mount like his.
However. my engine mounts are completely different to his – and therefore so is my alternator mount which is a standalone unit. Even considered using a different (smaller) alternator, but couldn’t easily find one that I could be sure would be easier to fit, and I had this one on the shelf already

I also did away with the automatic tensioner design and have just gone with manual adjustment for the sake of simpler fabrication (this version version 3 already – V1 was modifying the original, then I made a V2 to trial the OS fitment and worked out all the measurements to get it spot on – and then based on lessons from that I did V3!). But I think it all came out OK and if I have to adjust the belt tension every couple of years – no big deal!

Offside one that didn’t quite work:

You can just about see the bottom mount here. Forgot to take a decent pic of it on it’s own.

Top bracket and adjuster. Will clean it all up and powdercoat eventually.

It is pretty much perfectly aligned. 🙂