For suspension,
I think you are saying you have coils front and rear.
Being someone torched them, you need to replace all.
For the rear, you can get shorter coils or air bags.
For the front, you can use dropped spindles, shorter coils or air bags.
Remember this with air bags, you have correct driving height that needs setting each time after lowering sitting still.
Reason being for the front alignment to be correct.
Also, use stop blocks at point, air bag mfg., suggests.
As Always,
