It probably just needs to be de-tuned a little. If you want to send it to me, I will be glad to have it done for you here.
There are a couple of different ways you can set up and alternate air source. You can make it breathe really well (and risk a small free flow) or you can increase the cracking effort which makes it much less likely to free flow but makes it breathe harder.
Personally, I have mine set up to breathe harder, as I know it will still deliver the air should I need it, it just won't breathe as sweetly as my Flathead LT.
If you want to take it to your local shop, and they don't know how to de-tune it a little, they can certainly call Zeagle and Jim Fox will assist them!!
Sorry for your troubles!!
Scott