New Lancer GT owner

A quick way to tell if the engine is a 170 is to look at the bypass hose. That's the hose that goes from the underside of the head to the water pump. All G engines (170cid) this hose is almost 2 inch's long and on the LG engine (225cid) this hose is 3 inches long.
It's another story to find out if it's a 198...