Both timing and carburetor need to be checked and tuned in case anything was bumped or moved during shipping.
Each BluePrint engine is dyno tested with that exact carburetor that is installed and timing would have been set here to make the dyno pulls. We do not fine tune the carburetors from Holley. Tuning of the carb for idle mixture adjustments, float levels, jet changes, or other necessary tuning is required by the installer or owner. Do not assume fully dressed engine's are "turn key ready". Read the install guide and follow each step in full detail.
Standard Installation Guide: