Yes 166 it is a good saw to build into a race saw , it is just a lighter design of a 2100 but the only thing you will find is the 298 is alot harder to start than a 2100 becauce of the different flywheel recoil design
EHP when u get here in may to the saw contest i will talk to u about building this 298XP. and talk about the price of building this saw. thanks. 166dolmar