[FC] Headers on a greenbrier

[The Kidds]

Anyone have any experience running them on a GB?  I know volume is a 
subjective thing but think it would be too loud?  I am in the process of 
pulling the engine for a rebuild over the winter.  Both ears are broken 
off both sides of each log already so I am going to need logs as a 
minimum.  I dont care about heat as I dont drive it in the winter.

Other suggestions?