tranny front seal...from a chevy

My boss, a huge mo0par guy, tole me to get a particular seal for a particular chevy application....he said that this particular front seal has the same o.d., a .040 smaller i.d., and has a double lip.......

thought i'd run that by here and see what you all thought.....didn't want to give away the application though in case it's a secret....

but i may anyway