Zoomies? what the hell
Take the Zoomies off the heads and use a conventional manifold or header and you will get some engine vaccum signal back that the zoomies are killing at idle. Beast was correct about the power valve issue, accept that you do not have enough vaccum signal at idle to keep fuel atomised at low engine speeds like a blown valve would act like.
If you love them zoomies more than performance, then you are right where you should be with that set up. Gasoline carb set ups with zoomies net no idle power or tuneability in most all cases. When you get your blower you will be all set with them zoomies.
Bruce