Found this on eBay so thought I would ask "WHAT THE"
As I have never sighted a REPCO crossflow head I thought maybe ?
http://cgi.ebay.com.au/Holden-Grey-Motor-MANIFOLD-suit-FB-FJ-EJ-etc_W0QQitemZ170083381171QQihZ007QQcategoryZ32057QQrdZ1QQcmdZViewItem
Whatever it is, it won't suit a grey motor. Looks like it's for a 4 cylinder to me.
Repco looks like this:
(http://i29.photobucket.com/albums/c296/ret56fe/other/DSC00370.jpg)
cheers
RET
Looks like its a Datsun/Nissan manifold off a 180B/200B or thereabouts.
Terry.