another no brain question

[Xzavior240]

ok another question since Im to lazy to surf all the parts places to find out for myself. when I got my truck the front clip was gone. the guy told me it was a 72. I got the title today and it said it was a 71. now the question is this. in the bed there was 2 grills(as well as a rusty set of inner fender and fairly descent outer fenders rad. support and such. on the grills one has a big square cutout spanning the length of the grill between the headlights. almost looks like the ones that have the plastic square in the middle. the other one has a solid piece across the middle of this and a cutout on the upper and lower section for plastic. it also has the blinkers in the metal piece across it. exactly what do I have and do either one actually go to the truck? I know they both fit. was thinking about using the one with the lights in it so I can put a bumper on without blinkers. but for originality purposes though it got me curious.
thanks,
Dan