Great project, Nouman bhai is a knowledgeable person he his guided you well.
I would like to add few things as i think Electronically lockable differential front and rear is a better option then hub locks(lets say i personally prefer them more).
Secondly about suspension since you will completely over haul it its worth having a look at after market solution like Iron man etc.
I guess before starting all this complete overhaul you have checked your engine if it is in its prime best check would be a compression test and match it with OEM figures.
As in most of the cases people spend alot of money and ignore the engine and keep that for the last stage and then its left out due to budget constraints.