* The Demon 98
Over the years there have been who knows how many multi-carb manifolds produced for three-bolt carburetors like the venerable Stromberg 97 and Holley 94. And while they were reasonably good carburetors in their day, those days were more than 70 years ago. Lots of things have changed since then and carburetor technology is certainly one of them. What the world needed was a modern carburetor with a vintage three-bolt mounting flange, and that's just what you get with Barry Grant's Demon 98.
Similar in basic design and with most of the same features as the Six Shooter carburetors, there are two versions of the Demon 98. One is designed to be a primary carburetor and comes with either an electric or mechanical choke, idle speed and mixture adjustments. The other is a secondary style without those features.
Certainly the appearance of the 98 is reminiscent of the vintage carburetors it's meant to replace, but from a functional standpoint there's no comparison. The 98 uses contemporary circuitry like adjustable air bleeds to tailor fuel curves for the best throttle response, fuel economy and power output as well as acceleratorpump circuits with interchangeable nozzles that can be changed to suit the engine's needs. But for those who have run those early carburetors the 98 is meant to replace, the most welcomed improvement is the Demon can handle six to seven pounds of fuel pressurewithout leaking like a sieve.
If your goal is to make the engine in your classic truck look traditional, nothing beats triple carburetors. And thanks to Barry Grant, now there are two ways you can have that traditional appearancewith contemporary performance.
If you're looking for a modern carburetor with a vintage three-bolt pattern, look no further than the new Demon 98. They even accept the early 2 5/8-inch air cleaners. At 205 cfm, they flow slightly less than the Six Shooters. | 
This is the metering block from a Six Shooter center carburetor. Note the power valve; it can be changed to a higher or lower opening vacuum point to suit the engine's needs. The idle-feed restrictors regulate the amount of fuel in the idle circuits. | 
The end carburetors are quite simple (this is a Six Shooter, but a 98 is similar). No power valve or idle-mixture screws. The rear carburetor does have a unique 3/8-inch port for a PCV valve (positive crankcase ventilation) or a brake booster. |
That's the accelerator pump squirter under the Phillips head screw in the carburetor throat; the adjacent idle-air bleeds regulate the amount of air in the idle circuits. All three carburetors feature eight-hole annular-discharge boost venturis and .068-inch main jets. | 
Demon 98s look right at home on a Y-block, but thanks to vastly superior needles and seats, they don't dribble fuel all over like the vintage carburetors they're meant to replace. | |