Is my carb ok?

If you swap out the PV for a plug and take 'er for a spin with a vacuum gauge glued to the windshield, you will know right quick, when the PV should begin opening.
And if the MJ is too small you can tailor the PV opening point to smooth it out. On a streeter,I like to run early opening PVs and small MJs, whenever possible. It's a little nicer to drive IMO.

But yeah, DP for the win.
A 600 is just way too small