the vane is facing the wrong way around. the engine spins clockwise and blows it.
Incorrect. That is set up by the manual, with the vane blade lined up with the top screw of the gear cover plate, at fully closed throttle.
Edit:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=23929 has some more info on Corvettes, but it may not be 100% correct for the 1969-72 models, with respect to air cleaner/throttle controls.
Long air cleaner [top-opening] + separate throttle control [both VC-160 type] is correct for the G3 carby on the Corvette. That's what's shown in the pic in the second link in my earlier post.