1982 pontiac firebird conversion?

[unerismy]

i have a 1982 pontiac firebird that had a carberated 4.3 V6 in it that was blown up. me and my brother droped a carberated 350 down in it wit a 350 turbo transmission and all that. Im having no problems with the cars running and performance jus with alot of the conversion stuff. I have no idea what gauge cluster to get or where to get one for that matter, and alot of electronics wont work. Headlites wont flip up or down, fuel gauge rpm gauge and temp gauge dont work. i know hwy the rpm gauge and temp gauges dont work but not the fuel, which is very annoying. I bought a repair manual for the car and the only thing it says is that theres a wire that runs to the back of the car to a senson on the gas tank... the wire doesnt run along the frame i know that much... but i just need some general conversion help. if you have any questions feel free to e-mail me. a website about conversions or anything will help out alot. Thanks