The yellow "076" is correct, should be on the driverside near the u bolts. Im sure more will shim in about the date code on third member and tube I think the dates can be little closer than 30 days before car was built. Sometimes there is a letter behind the digits in the date codes, would be intresting to know what they means? There is usully a orange paint daub near the drain plug, and crayon mark ( 2 digits) above the date code on third member on the driver side.. can show pic for reference later. I have used cheltenham bold font for dates etc..

Thanks
Nicklas