'76 318 smoke...

Is the white smoke from the exhaust or around the rear wheel wells? Exhaust= BAD. Wheel wells =GOOD! J/K.:burnout:
Are you consuming any oil or coolant? White smoke, like thick steam is generally coolant & will make the exhaust smell down right awful especially with a Catalytic Converter on it. The coolant can enter the combustion process a number of different ways. 1, blown Cylinder Head gaskets or cracked Cylinder Head or Block. 2, leaking Intake Manifold Gaskets. 3, physical damage to the engine itself.
If you're loosing coolant try pressurizing the cylinders 1 by 1 with compressed air & check for bubbles in the radiator neck(cooling system full & bled). Of course you will have to make sure the valves are both closed on the cylinders you are testing. Easiest way I find on Mopars is to remove the whole rocker shaft assembly from the head & then blow the air in. That will close all the valves & you don't have to keep turning the engine over to get on TDC power stroke.
If you suspect it oil burning that's usually bluish smoke. Check your plugs for signs of oil burning. Looks like gray ash or gray with little black spots on the electrodes. Also a overly sooty tail pipe is another sign.