Paul don't think anyone runs a Jz head on an FE FC ???well not yet at least
the location of the manifolds on one of Joe's heads is different from a 9 or 12 port Holden head that some members run with Webers ...I know that the head with Webers will fit in an EH engine bay with only a little modifying to the firewall as Joe's cousin had a head and Webers on his EH think you may have to fit it up to see exactly what is required ...I am sure someone will have a shot of the engine bay with a set of Webers as a starting point ........FC427.......