Recommendation for Headers/Exhaust on 416

I doubt you'd see any type of substantial difference from 1 5/8 or 1 3/4 tubes with the cam you are running.

You could get Dougs or tti as they don't hang below the centerlink.

If you plan on hopping it up with more camshaft later, get a straight 1 3/4" header... Hooker, hedman, etc and leave the above two behind.