Engine Infamous "bucking" problem!!

Whats up guys? My car has been acting a fool for the past week. It all started with dying right when it first started for the day, but then running perfectly fine the rest of the day.
As things went on, this turned into a rough idle, bucking at around 2000 rpms... I went through the check list a few times and have tried to work out as much as I can between work and everything. I don't have a test lamp to pull codes, but I'm doing that tomorrow and I'll post the results. But between now and then I figured I'd ask for some thoughts.

So far, this is what I have done.
New PMAS calibrated MAF because I have 24lb injectors with no tune for them.
New air filter
New IAC
New MAP/BAP sensor
(IMPORTANT PART): New fuel filter, because I realized mine was leaking... Ran like a million dollars all day after, and now bucking again.
New cap, rotor button, spark plugs, and wires.
Deleted the EGR valve because it was cheaper than buying a new one in case that was the problem.

Next on my list is probable a TPS and oxygen sensors. After that, I really have no idea what it could be.

I should also add that I work at a parts store and I get this stuff for ridiculously cheap, so I didn't mind chasing the grimlin too much. But now it's getting ridiculous. Any thoughts on what I should be looking at?

You’re right! It’s a 1988 LX with light-ish mods. BBK ram air intake, B cam, mass air conversion, no smog pump, and a flowmaster exhaust setup.

Just an update because I feel like no one ever updates these threads after they fix the problem:

I was misfiring all over the place, and throwing codes for oxygen sensors. I replaced the oxygen sensors. It was still running pretty rough and misfiring. I dig around a bit and discovered that my timing chain was VERY loose.

So that was a lot of fun. I replaced the timing chain, and threw in a new water pump just because. While it was jacked up I decided I might as well put in a new oil pump too, hoping that I won’t have to unbolt the engine for a very long time.

After a new chain and adjusting the distributor, she runs beautifully!!! Now maybe I can focus on some fun stuff like making her look good and going faster! Haha