No hassle headers for 66 dart w/360?

cosgig said

Hmm, nobody mentioned the Spitfire knockoffs. I'm running an original set of Spitfires, direct from Harold himself!! Probably the only person who actually received them. They are not under chassis, but work just fine with my exhaust and manual steering. Knockoffs are still available thru Laysons I believe.

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You're one of the lucky ones. The biggest issue with the OP and others is headers and power steering. If my 273 car had to have more power and still have power steering, I would build the 273 and run stock manifolds. May be spend the bucks and have them extrude honed if that would make much difference. If the Dougs don't work with PS, you can't have it both ways.