The 337 should be the perfect intake for you. It will make more power than the Indy DP, it will have better fuel distribution and it will fit under the hood. All good things.

Pick up a copy of my big block book for pictures of the 337 intake. It can be a little hard to find the 337, you'll probably have to order it from your local Dodge dealer. Or try Mancini Racing. They might have it on hand.