Edelbrock TM-5 tarantula???
Yeah poor sales.
I got an old eddy dual carb intake, works awesome. Eddy still makes them for Chevy's, Ford's and BBM, for the SBM it likely was lack of sales Eddy stop selling them, not cause the intake isn't too good.
I compared both the old Torker and the TM-5 intakes, they are the same expect the the ports are larger up and down on the TM-5, the width of the ports are the same.
An old hot rod tip sheet from the 70's said for the street use the torker, for the strip use the TM-5