Here is a pic of a NEW TA Chall as featured in "High Performance Cars back in Nov '70. It clearly shows a single port breather and an open carb vent tube. It does have some mods like headers and progressive throttle linkage but I think you can safely assume the carbs and breather are original. As a side note, this is a great feature as it shows a RARE color pic of the lime green TA with the hood open and it is plainly visible that it has a yellow cap battery.