[KULTULZ]

It sounds like a fuel problem but the engine has to be in a good state of tune before going there.

If you take off an old carb that hasn't been serviced somewhat recently, you may disturb the settlement of debris in the carb bowl and that gets in all the circuits at fire-up. Most likely, it needs an overhaul, a quality filter and determining proper fuel pressure/volume.

You cannot determine PV selection until you know optimum manifold vacuum.