Cast Iron Intake Manifold 4173915 318 4 Barrel

What’s the weight on it? I can figure a close cost with the weight from your Zip To mine

Those will ship in a large flat rate USPS box for around $26, around 43 pounds.

yep, large flat rate GAME box

if the carb flange area isn’t too tall and if it isn’t, the the box would need taped every which way from Sunday with preferably fiberglass reinforced tape