What could I do with this Thermoquad?

I have been using & tuning TQ carbs for decades. Once all the emission ports are blocked off on the later 9000 series models, I noticed no difference in performance with the earlier 6000 series which had less emission ports.
800 cfm models had 1.375" pri throttle bores & these would be preferable on a stock or near stock 318.

The larger 850 carbs have 1.5" pri bores & would be good on a 340. The secondaries on each size are the same, so really only talking about the difference in the primaries. And the difference in actual operation is not that great. [ GM used QJs with the small 1.375" primaries on all their big block engines, except for just a few models].