Secondary diaphragm housing gasket

Just so's ya knows,, I dont even have a spring in my secondaries,, with gears and everything else,, it's absolutely perfect .. no bog.. no hesitation,, it just squats and goes like heck.. BUT you MUST make sure that the piece of linkage on the driver's side, that connected to the secondaries, absolutely shuts the rear throttle plates when at idle,, requires a little tweek with a pair of pliers,, cuz with no spring, that's the only thing closing the secondaries,.. do it gently (bend).... try it,, you may like it.. I sure did..