1965 LA engine 273-4 barrel intake manifold

Ship it USPS flat rate "large game box" for <$20. Shipped 2 like that cross country. No prob. Must remove studs only.
UPS has a "simple rate" if under a certain cubic inch volume, online only. Either methods will save your buyer $50.

Marine manifold has a steeper rake on the carb pad. Thats all.
I appreciate the info on that I had no idea.