I would say more of a stumble than vibration. Its like the motor is almost missing on a cylinder or 2. Some more info on the motor, it has autolite platinum spark plugs gapped at 40, msd 8.5 mm super conductor wires(new), hei distributor with msd cap coil and rotor. Although the cap coil and rotor are all new, the distributor itself is from an 82 El Camino.

Some other people I talked to say it could be the carburetor, the carb thats on there is the Edelbrok 1411, 750 cfm jetted for a big block, again it is still new.