High flow exhaust Manifolds?

Got some 71 to 73340manfilds for 250 plus ride

Sorry, I was talking about reproduction Max Wedge manifolds. Pishta started it. I was replying to post #8. Not really relevant to the OP question. Nice price on 340 manifolds. Put them up for sale if you want to sell them. They would work for the OP and you could use repro system for 340 or HP 360 dual exhaust.