I am working on a 92 RS (305/5-Speed manual). Picked up car for $800 from a guy so needless to say it has some issues that I've been tryin to work out.

First:
Speedo used to work MOST of the time and then sparatically go out (as in just fall down to zero, or completely max out and then fall back to zero, possibly bouncing around erratically anywhere in between there.). However it slowly got worse and is now mostly NOT working and only occassionaly working properly. Odometer doesn't work whenever speedo is out (if that helps). Wondering if this is an electrical issue (wire shorting out, etc.) or if this is a mechanical issue (speedo cable, something to do with transmision, etc.)?? any ideas? I have never done instrument work before so even little things woud be helpful.

Second:
Fuel gauge is not working and I'm thinking its the sender. I have heard from people that to get to the sender you need to drop the tank and the rearend? is this true? If that is the case I would probably have to have it done by a mechanic as I dont have a good enough shop space to do such a procedure. if anyone knows an easier way or other possibilities for broken fuel guage please let me know.

Thanks so much for the help yall.