[HEI451]

Those strips in the Holley kits are there to be added, by real world carb techs that know Holley service procedures, because MOST 4 bbl Holley carbs came with front teflon strips, but didn't have them installed on the SECONDARY shaft from the factory. The secs shafts were cut, but, not bushed. The rational opn that was, primary shafts are constantly in rotation, secfondaries aren't, so, less wear on the secs shafts, more wear, needing bushings on the primaries.

Lets not get out of perspective here, folks, the main reason to bush the shafts is to reduce the air leaks past worn shafts. Bronze/solid materinal bushings still need clearance, so, they only reduce an air leak. Teflon is a lot better to reduce even more, the clearance on cab shafts, thereby further reducing air leaks and binding at those shaft-base junctions. There are the not so great ways carb guru's use, the solid materials/clearance bushings, and, the way Holley does it, that method YOU can do for yourself, with simple hand tools, a very small number of specialty tools, like a drill press and drill bits, scissors, and a little teflon sheet, and ingenuity/effort, in your OWN GARAGE, if you are mechanically inclined.

Choice on which method works for YOU, is....all YOURS.