Napa PCV valve

["Dave" <dgfox@uswest.net>]

One more question today please.
I just picked up a new PCV valve (napa part #2-9254)
as advised on the list. 
What I don't know is which direction to install it.
One end is threaded the other isn't. Which end
should point toward the carbs ?
(I have a '67 where there is only one tube from the
timing cover canister to the intake manifold)

Thanks,
dave
'67 Midget (driven today, despite the threat of rain)