Thanks Len and Mark
the more I look the more I'm thinking they never had it. Can't ken why so many cars had it and so many didn't !
I've only questioned it after all these years as lately I smell raw fuel coming thru from suspected Thermo-Quad excessive high float levels in the 5.8, yet entire engine bay is dry as a biscuit.
The investigation goes on. I'm going to fabricate a fume-excluder for all my cars without them, as it could be a "silent killer" even with all systems perfect and no obvious fumes coming in. I've noticed all my 3 Toyota's have them.
(2001 V6 EFI Prado, 1988 HJ61 White Lightning Diesel, and 1985 MS123 5MGE DOHC 2.8 Crown)
Just checked my 1971 XY Fairmont 351, and it HAS ONE !
Must check the XC Forums to see what's going on
Thanks guys