We have one on our 235. Flex fan 1318 it is of good quality with SS blades and it moves a tremendous amount of air. I think its 18" in diameter. What is important are the clearances. We have one inch from the radiator face which is important for correct cooling (with a spacer installed on water pump pulley) and 3/4 inch clearance all around. We called Flex fan and they said 1/2" all around clearance would be fine depending how good your motor mounts are. They make a bit more noise at speed but they really work well in the cooling dept. T/C Steve