You'd have to contact Volvo customer service for this. IIRC, there were a couple different options for the 730 and 780.
Assuming you're referring to a Volvo VNL 780 truck, with the double bunk sleeper, 12'6".
there are two old style fuses in line behind the fridge you must pull the fridge out of the cabinet to check them
with a fridge
96 inches.
Any Volvo dealership, halfway decent truck stop, or - if a simple 12v cooler is sufficient (it was for me when I drove OTR), then you can find one easily enough at Wal Mart, Target, Best Buy, etc.
Try seaking seal
Volvo dealership. Have fun with that... if you've never taken off a Volvo starter, you could be in for a lot of excitement.
16"
15,000 to 18,000 lbs., depending on options.
You do not need any special tools to change out the auxiliary fan switch on a 1989 Volvo 780. The wrenches you normally use are sufficient.
On the right side of the throttle pedal
Curb weight for a 780 is typically between 18,000 - 19,000 lbs.