The "Cobra Jet" valve covers don't count. Damn.....
I mentioned the bore spacing problem on his original thread in "Open Water".
Bore spacing is different and converting the high rectangle FE exhaust port to oval may prove to be problematic.
But then again, I may learn something new on this.
Edit: he might be better off buying a set of FE truck headers, flipping them over so the exhaust runs up and then seeing if a muffler shop or header Fab guy can "cut and paste" to a set of TT Chevy headers. It won't be easy,but neither will the adapter.
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