[~The Jester~]

I might be wrong on this one, and for your sake I hope I am. But I was always under the impression that the Clevelands used a "FE" style header, where the flange is more "under" the exhaust port than on the "side" of it.

I attatched a pic of my Fairlane when it still had the Cleveland in it. Not the best pic in the world for what we're talking about, but doesn't it look like the exhaust ports are pointing "down"???

The other thing that popped into my mind whilst typing this, if you're building ANY kinda horespower from 400+ cubes, it's not gonna like the little pee-pee 1 5/8" headers you find for a Fox body to build your own.

That's a tough swap to do. What in the world posessed you to undertake such an animal?

Me thinks you're gonna end up with a local guy making custom (read as: PRICEY) headers for that beast.