Hy Guys, 58/59 frames and front sheet metal is longer than the 55B/57, plus as LAJones48 mentioned 55B/57 factory V8 trucks had a spacer to move the radiator closer to the engine. I have a factory V8 58 here and it still has its factory rad shroud, just eyeballing stuff I wonder if the factory 58/59 V8 rad shroud would solve your problem?