Convert Husqvarna 450 Rancher to run 3/8

[noise_in_trees]

I've been looking into changing my 450 Rancher 0.325" set-up to run 3/8" chains. This is the only saw I have running at this pitch, making my stacks of new chains collect dust (not sawdust).
I have many new 3/8 bars already, I'm looking for suggestions on clutch and sprocket.

 

[NSEric]

Oregon makes a clutch drum with rim sprocket for the 450 rancher.
Buy it with a 3/8 rim and you're good to go.