get a set of TTI race head 1 7/8 headers,uncoated, make an adaptor plate to convert your econo heads to race head spacing, make it the same thickness as the TTI flanges,carefully cut the flange off the TTI headers along the outside of the flange, remove the tubing thats left in the flanges and then slide the cleaned up flange over the primary tubes, just the same as TTI build them and weld them on, that way you wont have chassis/steering box issues as technically the headers have not moved in relation to the engine, once done send them for coating and your done