for your turn signal keep your eyes on ebay for a nos one. They go for anywhere from 50.00 all the way up to 200.
Chevy switches wont work. Here's one that says chevy and gmc, but again they're different and IDK what the differences are. Something to do with the ears maybe not long enough? Someone else might know the specifics.
If you get one dont torque it down too much. they break easy!
http://www.ebay.com/itm/1960-1961-19...61b6cc&vxp=mtr
also turn signals werent required on trucks until 1962 so you might never have had one!