I agree.    The engine while not great is likely fine if it is still running today.

The rest of the tractor is good.  

White continued to build the same tractor for many years with a 354 Perkins in it and sold it as the 2-85 and 2-105.       Later they became the 2-88 and 2-110.

I would likely pass on an 1855 but only because I would look for a 2-105 with a cab and preferably factory air.