It depends on if you are referring to an electric choke type carburetor or a Electronic carburator. The latter will require a computor, wiring harness and new distributor to name just a few. The cost would by far outweigh the good.
The 1985 Chevrolet El Camino ignition switch can be removed by loosening the retaining ring at the top of the switch. The switch will slide out. Remove the wiring harness from the back of the ignition switch.
The headlights do not have a fuse. There is a circuit breaker built into the headlight switch.
The electric fan is operated by a switch on the aircond receiver drier. The engine fan on the water pump is operated by an electric switch on the front of the head
There are different ways of doing it, you can get a manual boost controller, as well as electric one too. The manual is cheaper but the electric is a lot of fun to have.
The interior lights are controlled by the headlight switch and are protected by a fuse.
3400 lbs is what a normal El-Camino weights
what is the bolt pattern for 1985 el camino
Some had Fuel Injection with an electric pump and some had a carburetor with a manual pump. If it is FI it has an electric pump.
Manual? Stretched Cable? Frozen cable? Lack of lubrication? Electric? Blown fuse? Bad motor? frozen cable? Bad switch?
Your best bet is to go to jags that run they sell mounts, headers, and a manual for this swap
Try nada.com
The best thing for you to do is purchase a haynes manual for the particular car that you are working on. There is plenty of good information on all aspects of repair.