We are putting the next size up injectors in our 1984 Bluebird Wanderlodge with a Detroit Diesel 6v92TA. The original injectors are 9B90s and the engine was rated at 330hp, we are putting in calibrated 9G95 injectors for a bit more power. I am thinking we may be close to 350 horsepower. So this is the reason we are putting in a different cooling fan, to help handle the extra heat from the additional horsepower.