Welcome no.9avenger! 
The sheet metal is kind of reminiscent of the old Bush Hog tractors.
Somehow there should be a way to place the exact year on the engine by the numbers stamped into the shroud.
Here's a couple websites that might help with that:
A.S.E.C.C.`s Briggs & Stratton Technical Data
http://www.briggsandstratton.com/support/frequently-asked-questions/What%20is%20the%20age%20of%20my%20engine/?body_0$tbKeyword=date
The sheet metal is kind of reminiscent of the old Bush Hog tractors.
Somehow there should be a way to place the exact year on the engine by the numbers stamped into the shroud.
Here's a couple websites that might help with that:
A.S.E.C.C.`s Briggs & Stratton Technical Data
http://www.briggsandstratton.com/support/frequently-asked-questions/What%20is%20the%20age%20of%20my%20engine/?body_0$tbKeyword=date