The info you need for replacing the cam and timing gears is all the same for a 194, 230, and 250 engines. Nothing different there among the lot. The 292 truck motor is the same layout except the fuel pump lobe is in a different location from the car and light duty engines. Generally it is a good idea to install a new cam retainer plate and spacer sleeve when you install a new timing gear. They are still on the shelf at most Chevy dealers and the last one I bought was about 6 or 8 dollars. Both pieces come in a single little plastic bag.
If you can download or otherwise obtain free use of the info then thats 20 odd bucks you'll have for parts.
Mike
