Which heat exchanger are you using? Factory GT500?
It depends on what HEX and pump you are running. Variations can drive location to driver's side, passenger side, or front center (near horn) location.
If going hard-core...pay up and buy a Mezeire.
Do DOB's still howl or did it get fixed?
If you are using the factory GT500 HE and the factory pump than it mounts on the HE. Here is where I mounted my meziere unit.
Did you solid mount your pump? If so, that's going to be noisy..
It's got a rubber bushing between the frame and mount. Can't hear the pump anyhow over the HE fans, now those are loud.
Do DOB's still howl or did it get fixed?