carb replacement suggestions

Because a 800 CFM spreadbore carb acts differently then A 800 squarebore carb and the TQ is equipped in such a manor that the math above you posted can be thrown Out from a moving train.

The TQ has very small primaries @ 1.38 and 2.25 secondaries that are spring loaded for opening up when you want/need them to. The engine will use what it needs with that set up.

The kid gets it.