This may be a long shot but... I just found an old Detroit Jewel 20" cooking stove with four burners on top. The model number is 8240 but I can't much about it. I am sure it is setup for ng and need to convert it to lp. The orifice for the oven has a hole size .115" and each of the four cooktops have an orifice hole size of .099" because of these large sizes I feel it is setup for ng. One chart I found converted the .115" size to .067" and the .099" to .055" for lp. Does this sound correct? I called the only appliance place in the area but they didn't have much help to offer.