By the time you are done you will have that in it, unless you own a machine shop can weld cast aluminum, have some mad skillzzz and don't value your time. Then you will still have a compromise on the intake, way more so than sheet metal. But it CAN be done and there are a couple out there and they paid dearly.

B1 head and Indy head share NOTHING in common other than bolt pattern on the block. The intake bolt spacing is different as is the intake face angle between the two heads. Not to mention port size and shape.