TQ question

If your going to use a aftermarket dual plane, then my two choices would be a Weiand Action Plus or a LD-340 that has been carved to adapt the TQ to fit.
The 2 single plane intakes would be a Holley Strip Dominator or a MoPar M1 single plane.

(I'd be shocked if you found a Offenhouser (sp?) Port-o-sonic with a spreadbore for sale. In which they are sold new at a really hefty price.)

The low vacuum signal should be addressed with lighter springs on the center rod.