Engine Compartment Components?

Hello again, I'm 18 and I inherited this truck from my great grandpa who never got to drive it because he got diabetes. It sat in a garage for more than 20 years. I replaced the powdered brake lines and tires. Now I want to do everything I can to keep it a perfect truck just the way my gramps pictured it to be so long ago. Do you have any diagrams or info regarding the components, parts, housing, electrical wiring, reservoirs in the engine bay? Also, I am trying to learn and figure out what and where all the sensors are for this truck, so any Diagrams or info on where the locations for all the sensors for this truck would be also greatly appreciated. Any info will help and thank you so much for taking time out of your busy life.