273-318-340 4bbl Intake Manifold

What sup with the Marine intake, It has a different carb angle but thats it?
The carb angle is actually about the same as it was on my Torker 340. The problem was that it has a temperature sending unit pointing out the front instead of on top. Half of coil mount was broken off, and the water port on the passenger side was closed off at the temp. sending unit for some reason instead of going all the way through to the other water port. Not sure if all factory intakes were like that... but it was just too much to mess with.