A body BB manifolds on ebay
$4500 would be 1/16 of what he is asking for his m code dart, there are other hard to find parts on that car like the radiator but maybe lesser so since I believe its the same radiator that came in 383 GTS and hemi darts. radiator prices are a whole lot less.
$4500 is still too pricey in my opinion and no I do not want to own a pair of these unless I owned an unrestored m code dart SURVIVOR.