How about Napas online store? http://www.napaonline.com/masterpages/NOLMaster.aspx?PageId=430&CatId=7&SubCatId=5
Word of caution, '76 was the first year for metric fittings and fasteners in GM US built vehicles. That box will have metric fittings. Just a heads up so you don't have a nasty suprise when you go to hook it up.


Bill Burmeister