1981 chevrolet el camino

Owned since 1 year old by my father who ran a garage. Always maintained and kept in dry carport. Replaced engine and transmission many years ago. Now has 305 and overdrive transmission from a later year model. I installed a new 140 mph speedometer and new tachometer with new circuit panel and LED lamps. dash lights not working. Traced to a faulty ground connection. Need to fix ground, hook up tach wire, and speedo cable. I drove it about 50 miles last year to have it inspected. A/C compressor made noise so I replaced it. Dad is gone now and I have been holding onto his prize for two years. I am ready to let it go now. Needs nothing that I know of. Runs and drives very well. Tires are very good. I had new suspension parts installed up front and replaced air lines on rear shocks. Has sprayed-on bedliner covered with a thick piece of rubber. Drive it home.