I've owned my '70 for a year. Original engine (350/250) and TH350 transmission with 155,000 miles. I recently found a leak about 2 weeks ago which appears to come from the top of the transmission pan/gasket though I am not certain. I replaced the filter, gasket and purchased a new pan for the transmission as the older pan was in poor shape. Easy enough right? I topped off the transmission fluid, fired up the engine to take her out for a run but the car will not move, shift into gear or go anywhere, nothing, nada. Any thoughts?