Okay, let's put it this way.... a lumpy idle is generally a result of more valve overlap.... Which can be obtained by close lobe separation, or adding lots of duration. :grin: Looking at the cam specs I have on file, valve overlap varies from -19 for the '66 stocker, to +36 for Comps' 'Big Mutha Thumpa'! My Isky 310 is at +28, the TA 413 at +13. My Isky has a nasty idle.:laugh: For decent low-end power, an Accelerated Motion 223-234-110 has +8.5 degrees of overlap for a lumpy idle. Might be a good choice for Steve. Take a look Andy, I believe this one was on your list.