Considering Coyote build with cross-flow under car exhaust system.

[Aussie Mike]

Are you talking about full crossover headers like a GT40 runs or just headers with an X-Pipe? Full crossover headers will be near impossible but you should be able to run some under body headers and an X-pipe easy enough. There's a lot of guys down here in Australia running underbody exhaust systems, mainly because side pipes are illegal in most states.

One advantage you do have with the Coyote motor is that the exhaust ports point more downward than a windsor and you don't need to make clearance for plugs. this makes building headers a much easier proposition.

Cheers