Well we know the heads 750 airgap set of headers are capable of 400 hp, which leaves cr and cam, so I guess question how much cam and cr you would need to get to 400 hp out of a 5.2l, the 5.9l crate only needs 9:1 cr and a 230 .500" 108 cam can't see a 318 needing all that much more.
