Is 300 ft lbs of torque enough for a 79 CJ5?

Yes, 300 ft-lbs of torque is generally sufficient for a 1979 Jeep CJ5. This level of torque can provide good acceleration and off-road capability, especially for a vehicle designed for rugged terrain. However, the overall performance also depends on factors like the engine's horsepower, gearing, and the specific modifications made to the vehicle. If you're planning on heavy towing or modifications, you might want to consider additional torque.