[raggedjim]

I've done it both ways and always had better luck one piece at a time. I usually go radiator surround (leave loose), fenders (align to doors), Tighten back of fenders, leave front bolts to surround loose, grill, hood-latch, then start tightening every thing down watching all the alignments. Once the fenders, surround, and grill are all in and tight go to the hood. I usually add the inner fenders last, but some people don't. Inner fenders are easier if the wheels are off.

IF the front was already assembled on a truck and removed as a unit it will usually go back on fairly easy, but trying to assemble one off the truck and then add as a unit is an exercise in futility...

Good luck, Rg