Saw this on Craigslist - a ram air cleaner with two sets of fiberglass snorkles - one for '70-'71, and one for '72. http://denver.craigslist.org/pts/1796519840.html Here is some additional info after I contacted the seller: yes there is a little surface rust in the cleaner that can easly be cleaned out... Yes there is only 1 square cup. it will fit both the 400 and the 350.. could be used on either one... also there is a quarter size hole that someone cut into the back of the cleaner..
