Ram induction is an excellent solution, IMHO. The formulae are available to figure the correct dimensions.
As for fuel atomization, correctly designed, this will not be an issue that can't be overcome. After all, the 413 in the Old Man's '61 New Yorker never (well, not often, anyway) saw the high side of 3K rpm, yet was strong. It's all in the dimensions. And adequate preheating of the intake.
If need be, electronic port injection FI could be adapted from a modern V6. Many old mechanical FI manifolds have in recent years been adapted for street use.