Idk but a 1g head with a properly set up cyclone manifold is pretty efficient. But i dont think its worth the trouble to get a 1g head on your 7bolt block for a cyclone, now if you were doing a 6bolt swap then id say yea since itd probably be coming with the motor...
Also some of ya'l answers are too broad because he never stated his end goal with the car, and depending his goals porting a 2ghead could be worthwhile.