You are getting in deep now. With 350 engine, and an automatic transmission, you will need power steering, and either modify your stock steering column (cut the gear box off, add a lower bearing in the bottom of the mast, and weld a flange on the mast where it passes through the firewall , or do similar with a non-stock steering column. You will then need to modify your stock shift box internally to use it for shifting the automatic as well as fabricate a rod which goes from the shift box to the transmission shift lever.
Or you could spend a small fortune for something like a Locar setup. They have a number of styles.
