What would you build if limited to 372ci - with boost as an option

Coming late to this party. How advantageous would an inline motor be, since it may allow a significant reduction in vehicle width? A turbo in front of the motor?
This is the concept people use when building lakesters and streamliners. My friend has a highly modified Buick Straight 8 in his Lakester. In each class, certain modifications are allowed.

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