From what you're telling me, you're idle feed restrictors, are simply, too large.

Those 830 holley double pumpers, are like most double pumpers. They were designed for race cars, with big cams, and poor idle vacuum. So they opened the idle feeds up a bunch, to compensate. You are running TWO of them, atop an engine, with a fairly mild camshaft. There lies your problem.

Before we go nuts. Try this. Close the rear mixture screws off completely . On the secondary side on both carbs. Try using only the front ones.

Also, make sure your floats aren't too high. The higher the float level, the more head pressure you get, which will push even more fuel thru the restrictors, making this even worse. I lowered my floats down to where they needed to be this summer after my first ride last summer. They were a bit high. Just by lowering the floats, my Air fuel ratio at idle, went from 11.5, to 13's, without even touching the mixture screws.

Remember in loto when we dropped your "nuetral timing" to around 16, we were able to get it idling around 900-950, and still idle at what, 650-700 in gear if I recall? Rather than idling at 1100 in nuetral with 26*?

Those 900's idled like 454 mags around the docks

nice exhaust you have there on your run stand btw. Those stellings or CMI?

Icdedppl Great clip thanks. Im still wanting to know how all of you shift in and out of gear at those RPMs???

Transmissions. We don't have bravo's.

Although, I don't think 900rpm, should be an issue for a bravo drive. Im not super up to speed on the bravo stuff, so maybe someone else can chime in

MT that is one thing I thought about trying ( closing off the secondary idle screws )and havent yet but I will. Those Idle feed restrictors look small I haven't put my # sizers in them yet to see what size they are? Have you had any experience with moving the restrictors to the top of the tube inside? Ive read that helps with the emulsion in the tube??

Bravos don't like 900 very much and are hard to get out when at 900 under load

Dam if I had trannys I wouldn't worry about it LOL

Transmissions. We don't have bravo's.

Although, I don't think 900rpm, should be an issue for a bravo drive. Im not super up to speed on the bravo stuff, so maybe someone else can chime in

Must be an east coast thing ( Transmissions ) LOL!

I had solid roller setups with 35 degrees locked in timing idling around 1000 in neutral. In and out of gear was no issue on bravo's... FWIW

Looks like some kind of Mythical Blower Fairy.