Have some questions about lifting my Jeep if its worth lifting and if you do would my body handle the lift and going mudding

1. MY floors are rusted out as well in the back
I think they call it the body frame for the jeep that in great shape

2. what do i need in parts to do the lifted
I have the coil spring and picked up some leaf spring at came off 2500 Chevy truck that was lift 8'" so how many leaf do i use or how to measure the leaf to see if im sitting 4 1/2 in back

3. this what i was going to do
going to install my coils and then coming to do the leaf i was going to use some of the leafs and use a 2" block with helper leaf that came if the leafs and make 2" shackles
then drop my t-c 1", I have slip yoke front shift to use

I Can use some help with my lift

ps: with no cash