440 a-body manifolds
I see the 383 A-body manifolds bring about $400.00 a pair on Ebay all the time. I would think your manifolds should bring at least $600-700 if not more ,since they are so rare. I`m not much of a header fan and would love to have them but I need to divest myself of car parts. You could list them here for a week or so and entertain offers, and if nobody bites then give them a go on Ebay and see what they fetch.