You can buy both a assembly manual that covers the entire truck, and a maintance manual that covers the motor and running gear. You won't find these at most book stores, but instead need to check the venders listed here on the Stovebolt.
You may not find a manual specific to a 235 and Hydra-Matic with lots of pics. Much of what you need to do is common to almost any rebuild project and books covering any motor will help with that.
As for the Hydra-Matic if you are not an experienced mechanic you may not want to tackle that project yourself. Its hard to find a transmission shop that will work on that ancient transmission and parts for it can be hard to find. I'd suggest you ask who others have had work on them, and hire the work out.
The books on that transmission are out there. I've seen them for sale from time to time, and I personally own a set. It just took some time to find them.
While your truck is a Suburban, yours are running gear questions, and those aspects of your Suburban are identical to the same year 1/2-ton pickups. You might find more response if you ask these questions in the shop area of the forum. Some of the best people on Hydra-Matic questions may never look in the Suburban and panel area.
