These standard circuits wiring harnesses are very good:

http://www.classicparts.com/1950-52-Wiring-Harness-Generator/productinfo/52-023/#.WVbg0BPyudE
http://www.oldchevytrucks.com/cart/product.asp?prodid=EL165C&i=19163|||||

I use the Classic Parts harness.

If you want braided harnesses, the cost is 2x to 3x more.