My understanding so far is the smaller plenum with longer runners works best for a street application. I'm still looking into carbs, so much conflicting info out there. Once I get some more parts gathered I'll get that sorted.
I would say call BLP, Braswell or Dale Cubic for carbs. That's the top of heap with those guys.
Make sure you get TR specific carbs. They won't come off the shelf. The two biggest mistakes I see with TR's (I've been using them since 1984) is the wrong cam and carbs that aren't TR specific.
I always make the point with two carbs is that you double the needle and seat area, (which is good) double the bowl volume, double the jet are, double the bleed area double the emulsion and you don't double the airflow through the engine. That's why pulling a carb off the shelf and sticking them on a TR is a disaster...usually. The T-slot area doubles so they are fat at a cruise. The idle feed restriction doubles so the idle is rich.
The other thing is with the cam. You can use 5-8* LESS timing and close the LSA up 2-3* and run the same RPM as a single 4 but make more power and torque and torque everywhere.
A little time and money on carbs and cam will give big dividends on the dyno and in the car.