what exactly is the difference of these two? i have a b16 crank, head, ecu, sensors, rods and some other stuff can i use that all and just use the b17 block? will that make the motor 1.7l or will i have to get the b17 crank to do that? i read somewhere that the b17 block was the same as the b16! if i put together a motor using b17 crank and block and everything else from a b16 would that be a b17 then?