I figure a 500 inch street motor could do well with a small plenum single plane like a Torker or M1- maybe a Team G. The extra cubes may bring the operating range down. In the case of the Torker the range on a 440 is 2500-6500 RPM. On a 500 plus displacement that range may shift down to maybe 2200- 6200 RPM?

Keep old mopars alive.