There are some very high quality suspension components available through aftermarket manufacturers for the '37. A google search for 37 chevy suspension will give you lots of hours of price and component comparisons. Careful shopping now, and planning your project all the way through will ensure both compatibility of the components you purchase, plus you will have a good handling rod with a great set of brakes. After that, put the same amount of research into what "look" you want the body to have. As an old instructor of mine used to say, "Proper preparation and planning prevents poor performance".