Autocuda - the date on the Tech write up from Tom was dated 6/74.
At that point in time Tom wasn’t happy with the manifold and as you can see was still working on it.
I was still running Super Stock with my car and at Indy that year had the fastest car in its class using the STR.
To the contrary - never had any issues launching the car. A friend of mine was using the Weiand and he was a solid tenth behind me.
Bantering back and forth at a Milan test day - the explanation that was given was the Bauman carbs made the car fast and clean.
From my recollection they developed the Weiand further
at Spehar’s and Rossi was one of the first guys to get the cals for the carbs and the mods for the manifold.
I left SS at the end of 74.
Side note - the pics of the Indy manifold Doug posts - looks a lot like an STR derivative.