Over 100 Thermoquads

Correct!
The 9801 was calibrated more for performance and
a larger displacement engine.

The 9811 was more for a smaller displacement engine as it was
produced and calibrated.

The are the same basic carb and either one can be calibrated for
a performance or race car. Same verturi size and throttle shafts.
The are a much more refined and smooth castings compared to
the crude early stuff these cars came with.

When NHRA accepted these as a replacement for our 340 stock/superstock
cars = boy did we pick up! Before that we ran the 71 carbs. The 71's are
nearly impossible to find jets or parts for them. Especially strip kits and rich
enough Jets. The 9800s ARE faster. I can rework the early carb's booster
and venturi shaping them to work pretty well = But the sharper tech guys
(they have been around as long as I have) WILL catch and toss us out
(Maybe for a whole year) and I am too Old to miss a year of racing!

We race a half dozen of the 318 and 340 small blocks and are nationally competitive and have set several records and been to National All Stars.