I don't think that would work since the 170 is a low deck block and the 225 crank is obviously for the higher deck and with a way-too-long stroke (a whole inch).
The 225 crank and rods will go in the 198 making it a... 225. A 198 crank and 170 rods will fit the 170, but you have to grind the counterweights and probably some from the block at the bottom of the cylinders.
