Reproduction spacers/insulators are made from injection molded plastic and not bakelite as was original. For several years I worked with this material making piston rings for gas compressors which will swell ever so slightly assisting sealing ability. This is why gaskets are usually required that were not there in the first place.
Throttle rod length will probably also be an issue leaving it out.




1952 1300 Canadian 1/2 ton restomod
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