Mechanical vs hydraulic valvetrain

I recently bought a 66 Dart with a 225 in it. The PO said the top end had been swapped to the newer hydraulic style lifters.

Well, the lifters and pushrods were swapped however it's got a solid lifter cam in it. The top end is a total mess due to lack of lubrication in assuming.

I'm trying to figure out what rockers and remaining valve train components I have. Can anyone show me the difference between a hydraulic and solid rocker arm? How would I tell which set I have? Mine have a hex adjuster above the pushrod which leads me to believe they're for a solid lifter, but I want to make sure it isn't put together incorrectly this time.

Thank you!
1) Define "The top end is a total mess",..???
2) As stated, the oil starts at the top, nothing You do after that is going to make the "top" end a total mess.
3) If somebody tried to toss the hydraulic lifters & cam in there w/o the hydro top end & rockers/pushrods,..the lifters will stay collapsed and would quiet-up if You ran the adjustments down I s'pose,...but it wouldn't run too well.
4) You can't throw hydro pushrods on a set of mech./adj. rockers because they are ball&ball ended, not cup&ball as mechanicals are.
5) howsabout some pics....????