I have a really bad oil leak, I've replaced the oil filer adapter, made sure the drain plug is tight, made sure the oil filter itself isn't look but it still leaks oil looks like from my oil pan itself and the front of t

That's where every 4.0 shows oil when it leaks being its tipped back in the engine bay. Does the valve cover leak? It's possible the oil pan/rear main are leaking, but eliminate every other leak first before you jump on the rear main wagon.

where's the valve cover?

Are you joking? It's that long, narrow piece right at the top of your motor where your oil fill cap is located. You may need engine anatomy 101 before you take a wrench to that thing.

but it's leaking from below not from the top

Gravity and blowback

ok I'll do some research