Will a miloden deep sump pan for 360 work on 318/340?

Just bought a deep sump pan for 360 thinking that it will work on my 340. There are 2 part numbers one for 263-360 and then a different part number for just a 360 non magnum. Can anybody tell me what the difference is? Different main cap? P#20710 for 273-360 and 20730 for just 360.