Your body is held together with 10 Bolts

From reading your intro, you are aware that you need 10 body blocks and 10 longer bolts !
2 x Front Crossmember
2 x Inside front cabin, near where your feet go !
2 x by the lever to operate the seatbacks
2 x underneath front of rear seats
2 x captive bolts at the rear (can be a real biatch to remove)
Start by loosening all the bolts, the steering shaft and watch out for the sttretch on the hoses (radiator, brakes, fuel lines, and fuel neck filler)
Begin in one 'corner' and remove the corresponding bolts that will prevent lift. ie. if you start at the drivers side, remove both front bolts and the 2 other drivers side bolts.
Place a sissor/bottle jack on top of the front driveres wheel, place a small board on top of the jack and slowly jack it up until you can just slide the new lift block into place (keeping the small rubber protectors).
Loosely put the new bolt in and continue doing the other corners.
This is how I did mine (originally), other people may have other/better suggestions on how to achieve a body lift.
It should only take a couple of hours with someone else helping you.
When you do your body lift, can you please take lots of pics of each step and post them on the board, as it is a frequently asked thing that Feroza owners want to do to their trucks, and it would be a really helpful tool to refer to.
Good Luck