8 singles on a 1973 340

If you're sure you want to do it the easiest way would be to take something like a performer rpm airgap manifold. then cut the runners off and leave the base and water crossover. Then weld custom runners onto where you cut the runners off. I think four webber carbs would work better, one side per cyl. Inglese induction does a lot with them so you would be able to find stuff for them.