Originally Posted by Hambone
Start with the heritage pages and the information kit for your year. All the original setups and options are listed.

https://gmheritagecenter.com/gm-heritage-archive/vehicle-information-kits.html
I think you might find that the GM Heritage Center 1959 truck specifications document is incomplete and is lacking information on RPOs.

Here is that Specifications Manual on the Old Online Chevy Manual Project..

Please let us know if/where you find 1959 truck RPO information.

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.