Bad news for me, but potentially good news for someone else...
I mocked the headers up on the engine I'm refreshing for my Vette tonight and they don't clear the plugs (which are on a weird angle, different to factory GM angled heads) on my Edelbrock heads. I might be able to modify the headers to suit, but if anyone is interested in buying it I'll be happy to pass it all on for what I paid. Alternatively, I might be willing to negotiate on selling just the headers and flanges etc, and keep the exhaust. PM me or call on 0415 406 983 if interested.
Cheers and thanks,
Andrew