Dave -- the only cautionary note I'd sound is this: Even though you intend to have the original nose ready to go back on, when time comes to sell it will you be wanting to go ahead and put it back on before you offer it for sale, or will you take the hit financially because it's non-stock?
Non-stock cars are fine -- as long as they are yours. But when it comes time to sell invariably modifications away from stock tend to decrease resale value. That's because one man's dream may well be the next man's nightmare. That's just the way it's panned out after watching these sales of modified cars for years and years. No matter the quality of the work and the price of the parts, it seems that in 95% of cases modifications hurt resale value.
Yeah, you've got the original parts to put back on, but it's not a real easy swap. There's some work involved -- nothing impossible, but still some work. If/when the time comes that you decide to part ways with the car, you'll either have to put work into a project you don't want anymore (which is why you'll be selling it) or willing to take the hit because the nose doesn't match the year or the tail end. That means choosing between two ways to go, neither of which may sound all that attractive at the time when you just want the car gone.
That's my only caution -- otherwise, it's your car to fix as you see fit and enjoy as you like!
