You bought someone else's headache. When you buy used. It's a 50/50 shot. On this this one. You ate the bullet.
You need to get ahold of Joe at ZSpeed. He can go you going again with the right clutch parts. The previous owner might have not replaced the old CSC. If he did, it's was with the same oem CSC.
For the oil temps. Where you live at. A 34 row oil cooler should be on order.