According to Tractordata site (http://www.tractordata.com/lawn-tractors/000/5/8/585-john-deere-345.html) That is a 2000 model.
1978
no way
A John Deere 350 Industrial tractor was rated at 42 engine horsepower and 30 drawbar horsepower.
We have a john deer 350c with a 4 and 1 bucket it has a 3 cylinder diesel
12000lbs.
five thousand pounds
A John Deere 350 Industriial tractor has an engine horse power of 42 [31.3 kW] and 30 claimed drawbar horsepower. See related link for more info if this is what you were talking about...
Beer.
152 ci diesel or 164 ci gas(i think)
Its on the front of the seat support on the right hand side of the machine
The first obvious place I'd check would be you John Deere dealer(see related link for dealer locator). If they can't order the parts you need, try craigslist or ebay.
What ever they want to pay average 350 good perfect contion
The Deere & Company World Headquarters sits on 1,400 acres of beautifully kept land. The building includes offices for over 900 employees, as well as a display floor and a 350-seat auditorium.