I believe the second Gen doors are Longer. So they will not work. Same with the fenders and hood.
I would cut the Front ends corner (first gen fenders) section and graft it onto the second Gen Fender.
Headlight buckets should be simple enough to install. I would prefer a third Gen Hood myself. You can cut the corner section on the hood that curves with the Plastic bezel and graft them onto your hood. That would seem to be the easiest way IMHO. or........
Buy the First Gen and do as I did. X-cab baby.
A 22RE can come later. Love my Round eye Yoda.
1980 Dovetailed and Bobbed 13" back 18" front. 24" of space behind the driver seat. Priceless.
The black Yoda is my Best Friends First Gen. BUt he is square. lol