later model burb tank?

[krazy_texan]

has anybody ever put a later model burb tank in thier truck and if so what is the largest size tank you could put in, i have access to a 40gallon burb tank out of an 84 model and i am thinking of using it if it will fit, the tank is not here so i cannot measure it right now but what do you guys think about a tank that size, i thought of that size because usually when i drive i drive long distances and could use the extra amount, also would i have to get a different gas gauge in order for it to work properly or what.