Minor sticking point on the hood stripe: it extends to the windshield. So, if you're gonna swap hoods now and again, they'd better both be striped. It'll look goofy to have a striped hood against a plain white cowl.
How about using only the center portion of the stripe, leaving off the two outrigger stripes? At that point, you could use the rear of the hood bulge as a break point and not have to continue the stripe onto the cowl?
As far as the argent stripe: to my eye, a pale silver like that doesn't show well on white paint without some kind of break: in the case of the grille and taillamp panel, you have the chrome trim and I think it'll look quite good. As a stripe, I have my doubts--I realize your looking for subtlety here but with the way the light plays on horizontal surfaces it'll end up being kind of blurry or muddy rather than subtle. I would probably define it some more with a ridiculously-thin (1/16") pinstripe outline in either black or preferably a darker argent (something like what was used on the '72 Road Runner grille). It still doesn't scream "blackout stripe" but it eases the eyes' transition from white to reflective silver. Done that way, I think it would be more appealing than the factory-style blackout, which doesn't excite me on that body style in white.
Simply my own two cents' worth. Shoot a test panel (junkyard hood, door, etc.) and see what you think.