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i got my car on a lift.. well

i just need a new 02 sensor which is ez.
the thump noise is the exhaust hitting the rear end where it drops down. have to get a new pipe bent.
the rear end noises i hear are prob the springs. becuz there so short they dont sit firmly when not going fast so the wiggle around..ill prob take those springs and put the stock back in.
the clutch is acting weird sometimes it releases really far out..sometimes half way and somtimes it releases like 2 inches..which is sick cuz the shfts are QUICK. and the clutch smellls like it might be burning a little. just recently started. maybe clutch fluids?

I doubt the springs are moving around when you aren't going fast. The weight of the car is on the springs at all times unless you obviously have the car up in the air. I would keep checking for other noises. Also- you might not need to get a new exhaust piece made-up if you put the stock springs back in- that would obviously raise your axle from the exhaust pipe.

As far as your clutch, you might have a little air in the line- try a tranny shop, they will give you some good info..

thankyou. also when sitting in a long line of cars. and i go to slowly release clutch and give a little gas the car revs up to 1500ish than when clutch is almost released drops to 500. the car shakes. didnt used to do this. i can releas the clutch without any gas if doing it slowly