The GM boiler barell is 10.75″ in diameter by .375 ” thick wall. Boilers are not available directly from AN engineering. Laser cut hornplates are, including the LH plate with a 1″ offset pressed in. Boilers Tony B. (AJB engineering) has been the main source for excellent boilers for the Burrells and model live steam … Continue reading Gold Medal Tractor – boiler