That is a stock dipstick for cars with AC. It is routed that way to be accessible when the compressor is attached. I'd have to change valve covers to have breathers on both sides. I added on breather to the passenger side, which resulted in a rough idle. Thanks!
68 400 convertible - recent purchase
Used to own: 69 400 convertible - Winward Blue 69 350 convertible - Verdoro Green 69 350 coupe - Matador Red