These are the 68-70 340 hi po exhaust manifolds 2863549 /2863553 depending on who you talk to will support 400 hp,,
Of course condition ie. heavy pitting/cracks/working heat riser and legible casting #'s (because they do make repo"s) that go for $600 a set and which is roughly the going price for a mint set .... the real kicker is to have the driver side spark plug heat shield to boot !!!
If your motor is'nt a earth mover...you might want to keep and use those and have them ceramic coated, instead of selling your 1st born for a set of doug's/tti or I think there out of business ( Schumacher's) instead of dealing with fitment issues and longevity.... I just cringe when I read a post when some one says they just whacked a $600 set of headers with a hammer to make em fit !!!!!
