Here's great video on removal if the heads:
Assembly is essentially the opposite. Head torque sequence is a bit of a challenge in the car, I just did it a couple weeks ago. You will need an angle gauge, or a digital angle torque wrench.
I used the instruction guide from Trick Flow for installation:
https://www.trickflow.com/parts/tfs-...nstructionArea
Removing the liters is super easy with a magnetic pick-up tool, and the trays come right out with a couple 10mm bolts. Then new lifters drop into place, piece of cake. Most all lifter manufactures recommend soaking in oil before installation. The BTR lifters I used came in a convenient tray that I just poured the oil into.
If you are doing all of this, might as well do a trunnion upgrade too!