holley 780 on a 440 h.p. engine idles great, runs fine at cruise but has a horrible bog/flat spot just off idle.
i have tried adjusting the idle mixture, advancing/retarding the timing and opening the secondaries a tad bit. nothing helps. this is on a new rebuild kit. any ideas?
i have tried adjusting the idle mixture, advancing/retarding the timing and opening the secondaries a tad bit. nothing helps. this is on a new rebuild kit. any ideas?
