A technical note for anyone who may find this thread in the future:
Difficulty is a two (on a scale of 1-5, 5 being the most complicated work only to be done by those trained and probably requiring specialty tools)
Your new lever will come with un-detailed
Tools you'll need-
1. Craftsman 1/4 in flathead screwdriver
2. a hex wrench (for pushing the the pins out. I actually used a .22 snap cap on the locking bar
These henry's are not complicated machines (as some of the best and most reliable machines go), they have relatively loose tolerances, HOWEVER, there is a little slot that the top end of the lever assembly slides into, if you can't get the snap cap to feed during a function test, you should check that you installed the end into the right slot.
I recommend cycling the action a couple times while looking into the guts of it BEFORE disassembly. Pay particular attention to the locking bar. If you're really careful you may take a little video on your digital camera.
And finally, before you button your project up, make sure everything has a new light coat of CLP.