Here are two other pictures I found of the air cleaner crossover "missing" the
baffle. Definitely looks factory.
64 Rampside currently on Ebay
http://wholesalecalifornia.com/cars10/64_corvair/064.gif
on CCF- My New Rampside- The Stig
http://corvaircenter.com/phorum/read.php?1,322132,341407#msg-341407
-Andrew