I just did mine thru under the cab, takes some patience and careful effort not to crack the housing or fan, but it can be done. I would imagine its faster as well.
You can get the fan and all, out the bottom under the cab without removing the radiator. Do some twisting and squeezing in to get the nut off then it all comes out. Im working on a way to bypass the fan and substitute a spall fan in place instead of this engendered masterpiece. 🤦