manifold misfire 2a petrol

hi every one
What manifold gasket should be fitted to a series 2a petrol is it 2 individual tin gaskets or the full one that fits all the way agross the head.
Since i fitted the full gasket 1&2 cylinder dont seem to be recieving petrol Hence a severe misfire i have also tried it with the 2 individual gaskets and same result misfire i dont think its anything to do with the manifold gasket i think its just a coincedence ??? any thoughts gratrfully recieved

whern fittong single later gasket to manifold with the original inlet only gaskets you need to make sure 4 x bolt holding the two manofolds together are loose and they can move independantly to form seal on head then tighten 4 x bolts on manifold to retighten together