While swapping power valves is a simple cure for an overly rich mixture, we should point out that while contemporary Holley power valves will fit in a 94, they don't seal properly. The early carbs have a smaller sealing surface than subsequent designs, and the later power valves have a radius at the bottom of the threads that prevents a good seal. However, Charlie Price at vintage speed stocks a wide selection of modified power valves that fit and seal like they should. (He also has virtually every other part you might need for 94s.)
When F-100 aficionado Paul Willis decided to build a pair of 94s for a Flathead, he dug through his stash of y-block parts, called in a few favors from buddies, and soon had a box full of 94s for next to nothing. As there were at least 17 versions of the Holley 94 produced, the first challenge was to find a matched pair- the second was to find a base casting that didn't have worn-out throttle bores. He lucked out on both counts. With a matched pair of rebuildable 94s on hand, Paul contacted speedway Motors and ordered two rebuild kits and two extended throttle shafts. In addition, he took an educated guess and had Charlie Price of vintage speed send a couple of pairs of power valves, 3.5- and 4.5-inch Hg. Once the parts were on hand, we went about freshening up a pair of Holley 94s. Here's how you can do it too.
The New Stromberg 97Certainly one of the most popular vintage two-barrel carburetors is the stromberg 97. designed over 70 years ago, the stromberg family of carburetors included the type 40, 48, and 97 used on the '35 through early '38 Ford 85hp engines. In addition to the carburetors manufactured by stromberg, the Bendix Corporation built replacement 97 carburetors under license. now brand-new 97s are available again. After years of rumors about their existence, they're a reality. Check with the manufacturer or u.s. dealers such as H+H for more information.