[TWR]

I'm gonna gut it and run the glacier breather

If you do both and likely will have a oil mess under the hood, if you gut the filter run a hose somewhere down on the frame to puke on the road. As for oil leak wash the front of the motor off to see where the leak is first. It could be the crank seal/ front cover or behind the gear housing between it and the block.

 

[TWR]

You can try doing both but keep your eye on it and if it starts making a mess just take the breather off and install a hose down the frame. Leaks between the block and the gear housing run down and look like a crank seal, best to wash it off then keep checking till you find the source of the leak for sure. The last think you want to do is fix what you think is leaking then find something else was the leak.