I am in the process of lightening one of my aircraft. One step I am taking is to swap out the Brison 2.4 gasoline engine and replace it with an OS 160 glow fuel engine. Can anyone tell me if I need to change out the fuel system, which is setup for gas, in order to start using glow fuel?

The rubber stopper and the fuel lines are usually different for gas vs glow

I'm not totally certain but I think you can use the gas stopper and fuel lines for glow but definitely not the other way round. Mineral based fuels/oils (petrol or kero as in diesels) attacks the silicone type rubbers used for glow fuel.

OK, so, I've done the conversion from Gasoline to Glow fuel using all Gasoline components in the fuel system. Here's what I found out:

Gasoline components used in the fuel system for a glow fuel setup mostly works fine. I have no problems with the glow fuel attacking any fuel system component, however, the one issue I did find is the following. In a glow fuel system setup, most of the time you will run one line to the muffler for fuel system pressure. Note that this is not true for "pumped" glow fuel systems. However, if you need to run one line to the muffler, then you need to change that line to silicone. If you leave that line as Tygon, then the heat from the muffler will melt the fuel line (pressure line). Using a silicone line for muffler pressure will not be bothered by the muffler heat.