I have way too much play in the steering on the 48 and must find a solution.I have tried all the simple adjustments advised with no sucsess.Can I find parts to re build the gear and being more of an artist and less of a mechanic,could I do this my self?chef

The most common part needed to rebuild the 1939-48 steering gear is the sector shaft.It was sold as a kit that included the shaft plus the two bushings in the housing that also wore out.The sector shaft replacements were sold thru Chevrolet plus several after market parts suppliers (due to their frequent need). I see them listed on Ebay from time to time.
The pother item that can cause excessive play in the steering is the two piece pitman arm (it attaches to the sector shaft and the tie rods attach to it).The pitman arm on the 1939-48 cars consists of two forgings bolted together.There are four hard rubber insulators between the tow halves.These bushings disentigrate over time causing lost movement in the arm itself.The bushings are available thru the Filling Station (I also have some originals).Either way the arm is removed during the rebuilding of the steering gear and its bushings should be replaced.I would recommend finding some one to rebuild and properly adjust the steering gear.