Thanks everyone.
I have a quadrajet here and a standard manifold.
I thought I'd give this a go first. There seems to be a difference in the hole spacing / position.
The 4 barrel manifold middle hole ( from front to rear ) has two holes and the one I took off ( 2 barrel ) has only one middle hole.
Is there an engine guru that can tell me whether my engine is early or late. ( I doubt that it's the original engine )
It has the front fuel inlet. Is this a problem apart from lack of originality?
I'm not sure if it'll go but it doesn't now anyway ( just idles )