The Dart is now in hibernating

Insurance is down to storage coverage. Fuel is at less than quarter tank. Thinking seafoam in the carb and tank? (whats everyone doing?)
I have a spare 1968 single spline side gear 742 clutch type 3.23 diff. Only thing missing is the 1350 series yoke. 3.91's got old cruising this year. Thinking a little spray with the 3.23's wll be the best of both worlds.