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You might want to do more research on the value of your Ruf R50 5 speed. They are the only bolt in upgrade that is worthwhile. As nice as the G50 is, there are as many downsides to the conversion as upsides.
I looked hard at this on my present 930 [after many years running a G50 in my previous turbo] and sourced a R50... at 2x what is suggested the value of yours was. I admit that mine was brand new and had listed at over $12K, without the extra bits required to make it work. Unless yours is in poor condition, I would suggest the lowest price you should accept is $7k to move it fast. You said it was in fine condition, therefore I think the value is $8-9K. These are very durable and sweet functioning transaxles. I LOVE the action with the Ruf shifter. I spent time driving my R50 and my brother's very trick G50 back to back. It was a toss up. My brother wanted me to sell my R50 and let him do an upgraded G50 swap so that we would have common technology with our cars. I declined. There is no way of getting around the fact that you have to hack up the chassis to use the G50. [If I hadn't been able to find that R50 I would have done the G50 in an instant.]
Here is my suggestion: Use a carbon kelvar clutch setup[ or whatever they are doing these days to increase grip while reducing effort]. They don't require nearly as much force, grip smoothly, and work really well. My brother [Porsche tech] also adjusted the clutch arm fulcrum to reduce the pressure. My old clutch gave me a real work out. When I first drove with this clutch I was yelling about how it felt like a HONDA!
The if you lighten up the clutch the only downside to using the Ruf R50 is the 1st gear setup. No, I don't mean the dogleg. I enjoy that aspect of it. The issue is that when it is warmed up and idling at a complete stop in traffic, it many times doesn't want to go into 1st with first putting it in another grear. [This is a design issue on the 1st grear setup and common to all R50s] This can be a PIA when you are in aggressive commute traffic. In casual, pleasure, driving this hasn't been a factor for me. When I find myself in the "wrong" type of traffic, I just put it in 1st as I come to a stop and hold the clutch in. The additional wear and tear that causes is insignificant as I don't put enough miles on it to worry about an issue in my lifetime [I have only put about 10k on it in the past 15 years and have "too many cars"]
I really hope you investigate lightening up your present clutch effort first. Most wrenches don't even bother considering this. Either way good luck!
JR
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