It has been done .. But I would say the expence would outway buying a specific custom exhaust manifold.. Besides I doubt anyone would have any warrenty on it..
The only way I can see it done other than welding cast iron ? Is to make a 13mm steel plate holes drilled for exh ports etc . Studs on one side and bolts through the other..
From memory the exh bolt pattern is different...
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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....