Twin Turbo '74 Duster

Ceramic coating will run you about $300 for the set and you are still left with all of the bumps and irregularities that will restrict flow. I am on a shoe string budget trying to do everything myself and I can honestly say that I believe my manifolds would look exactly the same as yours, which is why the only thing I'm not welding and doing my self is the manifold. I'm starting out with SS mandrel bends, cutting and spot welding to taste then bringing them to a pro to put the seams in, may be around $600 by the time it's all said and done. The down pipe, exhaust, no problem, hack it up as long as it flows. Just my 2 cents, but when prine talks turbo, I listen, and mad darts politeness aside his twin turbo is the envy of the block and if hes not sure, u shouldn't be ether. Your honesty and quest for good info will keep you on the right track and I'm just being a pain in the ***, so good luck with the build and keep us posted!:-D