It bolts on, but there will be a step down in port size from the intake to the head which most likely would reduce power when used with 240 heads. It is really designed for factory cast iron MW heads on a RB block. The 337 as cast tends to be a little smaller than a gasket matched MW port.
It is a good flowing intake but it does have some Mopar Performance weirdness. It has a built in valley plate which can be a good thing or a bad thing depending on which heads you are using. And it has built in bosses for a hood scoop (or maybe for EFI rails) which mostly just get in the way. It also has big bosses for either fuel injectors or for nitrous so that can be a cool feature if you're thinking of port injection down the road.