Bumper, bumber ends, Grill front valance?

[Pubydingus]

I am in desperate need of some body work on my 81 datsun 720 so i was searching and pricing the few parts i need to turn her frown upside down lol...anyway I was on eBay I found a front valance for my year but I wanted a chrome bumper and grill and chrome bumper ends. It seems everything I want is for years 83 and up. And I will add that searching these parts are done under "nissan" and not datsun. Same trucks for the most part.

1) Is a front bumper for an 83 84 85 86 gonna bolt right up to the pre existing bumper brackets on my 81?

1a) If it won't would I just buy bumper brackets for the correct year bumper?

2) Same for chrome grill 83-86 and from the looks it does in fact look different from 80 81 82 grill just basing this on pictures. My years I can only find black. If you can fab it is it easy? has anyone heard of it getting done?
3) As far as bumper ends go the original black ones (which I don't even have on my truck anymore) are available for my year pickup for a rather cheap price. I wanted to replace them with the chrome ones you see on Nissans. In looking it seems none of the chrome ones are the correct length to reach the holes in the fenders where they bolt up. I am just basing this on looking at the pictures. Also can not find them for an 81. Did the size change after 82 or did Nissan's have different front bumper "set ups"?

3a) Would it work to patch the existing holes in the fenders and just make new if the chrome bumper ends were in fact shorter?

4) If I got a front bumper and brackets, chrome bumper ends for yrs 83 would it all fit together on my 81. Question 1 and 1a might answer this. Would front valance factor in here?

[PEZi]

The 720 always uses the same mounting spots... across the board. All of the parts you mentioned will fit from other years