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Hey guys are there any major problems to going to a 400/208 from a 350/203 I know the 208 slip yoke in the rear and front dshaft length but its going to be a while before I can get a doubler and this seems like the best solution for me.
need crossmember if 85 and newer setup. redrill holes for it in frame. and diffrent vac line to modularor. then dont forget the kick down switch setup on the gas pedel. possible longer speedo cable and diffrent gear for it also. thats about it. good luck.