I'm glad you posted that because I was going to forget it.
I'd also point out this page which explains a lot of what needs to be done for using an NG3 (
https://www.greytower.com/jon/lotus/europa/gearbox/gearbox.html). This page implements Richard's (at Europa Engineering) method of using an NG3 with a Europa. Part of that is Richard's way of doing the shift linkage. It requires some changes in the end cover which are described on that page. The linkage is very similar to the S2 linkage with cross tree/bell crank type arrangement near the front of the 'Y' of the frame and so if the body is on your frame, it might be difficult to attach the pivot for the cross tree to the frame. That being the case, a cable shifter might be the way to go. The link that Blitzen posted hopefully gives enough information on how to implement that on your car. There are other designs for cable shifters: (
http://lotus-europa.com/manuals/files/Shifter.PDF) and (
https://groups.io/g/LotusEuropa/files/Cable%20Shifter) and (
https://groups.io/g/LotusEuropa/files/NG3%20Cable%20Shift) and probably others (some of those may be dupes)
There are some modifications described in the greytower link I posted above that might be advisable but not required. For example, he describes beefing up the hole where the NG3 pilot bearing goes. I didn't do that because Richard didn't mention it to me. I don't know if Richard decided it wasn't absolutely necessary or he forgot but I haven't had any trouble in that area. I think there might be some other mods mentioned in the greytower link. I don't think I did any of them. Richard sent me a kit including tranny, mounts, linkage materials, pilot bearing, and hardware. I just assembled it.
Well, "just" isn't really accurate. My frame was for a 365 or 352. When we test fit the tranny, the rear hoop interfered. It didn't look like we could get it to fit so Richard sent me a 336 rear hoop which did the trick. All that being said, I have seen an NG3 installed in a 352/365 frame (or at least pictures of it). It was accomplished by dimpling the portion of the rear hoop that fouled the tranny so it can be done and it is probably easier than replacing the rear hoop.
The Renault pilot bearing is apparently rare. I notice that they are out of stock at Lotus Supplies and Kelvedon. There are two options: find a rare one or make your own. I got a bearing for my NG3 from a fellow in Canada who sourced one. He seems to be able to find unobtainable Renault parts so I would try him. His email is olivier at ateliermahoa dot com. He also has a Facebook page for his business (
https://www.facebook.com/ateliermahoa/). I would try Olivier first. However making one doesn't look like it would be that difficult. I made some measurements that should be enough to make your own and you can make it better by making it rebuildable (replace the seal and bearing).A company makes a similar rebuildable pilot bearing for the Mitsubishi 3000 (
https://www.3sx.com/3sx-high-performance-billet-input-shaft-bearing-for-5-6-speeds). The concept is pretty simple and should be easy enough to replicate for the smaller NG3 bearing.
