Rack and Pinion vs engine setback for header clearance?

The stock frame held the hemi motor in 68 so it should be plenty strong but there arer a couple different ways to go. AlterKation front suspension would open the whole thing up but they are close to $3000. Mancini also makes a tube K frame w/rack-n-pinion mounts. That too opens up the motor compart, the alterkation actually allows you to remove the inner fenders and shock towers.