Great – it looks like you have what you need.
Before doing anything, I would remove the aftermarket A/C brackets from your bracket set (white circles) and I think you will be fine.
View attachment 20090
I believe the pulley (yellow arrow) is also for A/C – but not 100% sure.
That idler pulley is what I call a normally wearable part and might need to be replaced (if it is needed, that is). To check, give the pulley a spin and feel for looseness and for roughness. If any is present – then replace.
Next step is to take what you have in picture (but not the pulleys – unless you have a way to keep pulleys “tied down”) to a car wash – as is. Get some good spray degreaser and wash the dickens out of what you have.
Once done, disconnect the lines then drain the P/S system. There is no good way to drain it out – but you will want to do so, after it has been washed (to get rid of any water in system).
Parts will get somewhat oily after the fact – but it at least won’t be caked on greasy.
To drain pump, remove cap and turn upside down – into something. Turn back upright and give the pulley a spin a few times clockwise. Then, place a hand full of folded up paper towels underneath until ready to use. It will seep for a while – but not make a big mess.
To drain gear, turn upside down the best as possible, then spin input shaft a few times back and forth. A lot of fluid will come out. After a few times, you will be able to use the Pittman arm to spin it over – but not for the first couple of times. Place it upright, wipe off residual fluid – and it will be good to go on.
Use new fluid after installed.
If rebuilding the coupler (which I recommend), it can be done with shaft still attached to gear, on the bench.
Your P/S hoses appear to still be good shape.
This would be a good time to paint items – if you wish to do so.
/6’s don’t have this problem as much as the 318’s with pre-cats, do. The steering gear input and output shafts seals are close by the driver’s side catalytic converter – which can operate at temperatures above 1,000’ F.
The reason I mention this is I feel that is a common reason why those seals leak on the V8’s a lot (my opinion only – no facts to back this up), is the seals burn up. I feel getting rid of (if possible) of the pre-cats and lengthen the lifespan of the power steering gear box seals (on V8's).
I don't see any significant leakage on existing parts – or it would be “oily” than “caked on” greasy – if that makes any sense.
BudW