Jeeps never get old. Rust never been a problem, U can rebuild the body tubs and all Jeep Parts & Accessories R easily available.
Saad-q, U have found the lost treasure & try to re-build this baby as a great off-roader in a reasonable budget.
I can C U have started it very well and wish U good luck for UR Jeep Project.
Will U be putting the same Nissan Power Plant if U R looking for other options then go for 2L-TE or 3C-T.
What about transmission, suspension and axles? I will advise U to go for Rocky's 5-speed gearbox. Also Rocky’s transfer case as it has an offset rear output shaft like the Willy's original, you can keep the stock axles.
Any ways U may have UR own plan but if U need any help then do contact me.