Guts can hold gas that could be varnished ....stinks BAD and most likely contain LEAD...LIQUID LEAD...poison!!!!Ok for outside not so good in the house.
Even if you drain them with the plugs, they usually will still hold gas.
The last pump I sold, the guy wanted the guts intact so he could use it to fill his Bi-Plane...you never know what request you will run into down the road.
There is a downside to gut removal....some of the parts that are in the cabinets are still needed at times, and they get sent to the scrapyard. I rebuilt some Wayne 60 METERS for a guy in Alaska. He had Weights & Measures approve the use of dispensing gas from two Wayne 60's. I had to use 6 cores to build 2 good ones....he wanted 4 meters. I could not find more cores at the time.
Wayne 60/70 Meter.
Gears off the tops of G&B meters will work with some modification to fix the gears on the stepdown mech for the reset on Wayne 866. I used gears from an Erie meter to build a few clocks. Right now I need 1or2 gears from a Wayne 2pm3 meter.
Actually after you gut it, all you have is a CABINET with a computer in it.