Thank for the tip, I'll definitely bookmark that. I did some googling on sintered iron plate clutch disks. Even tho I didn't see anyone listing this size disc, I have a hunch that a lot of these racing oriented engineering firms can probably produce one for order.

IIRC FR34 is similar to Burton BF134 that I had on my other turbo engine. It's a bit mild for my taste, but definitely recommended if you want to make a very streetable engine. Also retarding this cam quite a lot will transform the engine completely, it doesn't loose any of the drivability low down but will make the engine rev much higher. IE. on manufacturer spec timing it stopped pulling at 6300 or so, but with retarted timing I saw 7800 rpm on few of the datalogs... I settled for 7300 rpm limiter at that point. So will yield for a very wide power range with a perfectly sized turbo and enough boost.