The single top makes a nice coffe-table conversation piece, or a trivet in the kitchen. Lots of folks on here will tell you of the near impossibility of getting the 4 end cylinders to feed a decent mixtureway out on the ends.
The TR is a high-rpm design intake, works great in the vicinity of 6,000 RPM, seldom worth a damn lower down.
Pros,
High-bling factor.
Higher bling factor if polished.
performance gains IF you have one seriously wicked bichin monster motor
Cons,
buy a seccond carb (another $400)
Linkages to buy, tune, adjust to sequence properly, swear at all the while
I have seen a FEW people on here deny the greater fuel consumption, but MANY who admit to it. "Burn LOTS more gas"
hell of a time getting idle and lower midrange to run well, as it is not designed to run in that RPM range for long.
Often performance gains on most motors (see exception about seriously wicked bichin monster motors) switching to a proper size single 4-barrel and a good single plane or high-perf dual-plane (like the Performer RPM Air Gap) manifold, especially if RPM max is UNDER 5500.