Did you have to get a longer belt to run the 6.7 WP. on the 5.9?Put the 6.7 cummins pump on the 5.9 in my 03 last year. haul a 11k lb fifth wheel up the rockies a bunch and find the extra coolant flow a good thing. the late 6.7 pump has more and larger vanes on the rotor. be working well so far.