Yes, I recommend installing the hood vents. I like the look of them, and I think they help the cooling a bit with the radiator in it's original location, but if you lay the radiator forward a couple of inches this uncovers them entirely and improves things further still.
I have installed a much thinner aluminium radiator, and in doing so have almost uncovered the vents without laying it forward.
Your hood will not warp if you have a good metal man. How far away are you from Ron Fournier's shop!