To resist twisting in operation, Stromberg shaft extensions are high-grade stainless steel, with a larger diameter section extending as far up the shaft as possible. For improved looks, it covers the 97 throttle shaft bush. It’s fixed with a 3/32” roll pin (supplied) through the hand throttle mounting hole on the end of every 97 throttle shaft. And the stainless ‘trim-to-fit’ bracket supports the free end of the extension with a PTFE-lined bush for smooth operation.
The Weiand WC4D and the Edelbrock CD-694 manifold for early Cadillac are good examples of manifolds which set the Strombergs in an overlapped stagger. Most ‘blower plates’ for mounting 97 on GMC-style superchargers do the same.
All of these place the carburetors so close together that you cannot get a linkage rod between the two banks of carburetors.
Our 9136K kit will fit intakes with a 3-3/4” maximum offset between right and left banks. The extension support brackets can accommodate up to 4-1/8” offset between the two banks of carburetors – enough to fit most ‘known’ intake applications. The shaft extensions should be fitted to the carburetors on the right side of the car (from the driver’s seat). The supports slide onto the extension (with the bush pointing upwards) and mount to the carburetors immediately behind. Check out our installation ‘How To’ in the Tech Center tab above.
