Your fortunate the transmission was already a later model for your new shifter. Been there! TQ is a great carb, senses air demand. Tighten air door screw while holding lock nut loose, try 1/4 turn. There is also a rod hanger adjustment screw that you can dial in easily. 65 is not the easiest year to modify, everything is tight. I got some driver headlight bezels if yours are missing.
Oh yeah, the performer you bought has 318 sized ports. Easy to port match but they are small out of the box.