Joe - if you collect these old magazine then there is a guy selling entire year blocks for about 15 years worth of National Dragster... (This is all 1 big URL)
http://search.ebay.com/ws/search/SaleSearch?a23731=23752&a23712=-24&a23713=-24&sapricelo=&sapricehi=&combinetmp=y&combine=Y&satitle=national+dragster&sacategory=607&alist=a23731%2Ca2%2Ca23712%2Ca23713%2Ca23771&catref=C3&pfid=1403&sosortproperty=1&from=R10&ht=1&reqtype=1&basicformname=forminput&sotextsearched=&gcs=1131