My 355ss has a 1702A engine. Just purchased a manifold from kubota for the same $ as after market
How did you determine that you have a V1702A engine?
All my research and information only shows that model equipped with a V1701A.
And the V1702 didn't exist when that model was first made, it came along in the middle of production and thus was never installed in it.
The V1702 or V1702-IDI was never equipped in a tractor, only a backhoe, the KH90.
The V1702 IDI was also very popular and common in a Bobcat 743, (I have that model Bobcat) I also have a V1702 that is now just parts.
Then the V1702-DI-A was equipped in the proceeding version the L2850
Did you buy it new or used?
It is possible that if you got it used that someone has swapped the engine.