overheating Ford 302 FINALLY SOLVED

After replacing the rear axle seals, bearings and brake lines, I wanted to take the car for a quick rip around the neighborhood but the engine began overheating again. Thought I had already solved this by flushing the system and properly "burping" air bubbles out. I always had a feeling the coolant passages were blocked, but I thought it was typical rust deposits, not High-temp RTV blocking all the coolant passages. Whoever "rebuilt" this engine got heavy handed with the RTV, which i don't think you need to begin with.