1985 Land Cruiser carburetor/vacuum issues on 1990 Toyota Land Cruiser

1985 Land Cruiser fuel/emissions problem Seems to have vacuum issues. Replaced intake exhaust gasket, carburetor rebuilt, new fuel pump, Runs fine at times but starts to loose power to where I have to bury my foot in the accelerator just to keep it running.

Asked by for the 1990 Toyota Land Cruiser
Check the fuel filter.
Why vacuum issues? If you put a vacuum gauge on it and the vacuum is low, you may have a plugged eshaust, for one thing.