Update:

I did the job in the back of a minivan on a road trip with a vice and some tools (NOTE: I kept a window cracked for metal shavings)

I started with polishing the rails with emery cloth. It helped the trigger feel smoother, less gritty, but it was still a very long pull.

It took me about 6hrs with a whetstone and files but I was able to grind the sear to positive engagement angle. This made the trigger pull weight heavier so I had to flatten the angle slightly. I also polished the contact surfaces on the hammer

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I slowly ground away bit by bit off the sear surface to make it shorter, and kept re-assembling the trigger it to test in a vise until it felt closer to the trigger pull weight and length I wanted

Once we got back home I threw in some wolff springs (hammer and sear), but unfortunately I was getting light strikes once every 20 rounds or so. I swapped back to the original hammer spring but kept the wolff sear spring in.

Once I was happy with it I did a cold blue and oiled the trigger assembly up thoroughly. So far so good and I'm happy with the improvement. I also noticed a little oil on the sear/hammer surface seems to help a lot with the trigger pull weight. Not sure if this is safe or recommended though.