[deuce_roadster]

There are a few minor differences between a 40 and 39 heater and I believe the one pictured is a 39 due to color and shape of handles. If you painted the heater gray, put red stripes on it and 40 handles as well as correct toe guard, I think it would be the same as a 40. Kube would know for sure. If you only want a heater that works, what you have will certainly suffice.