Inclines usually point to the fuel pump because if its going out it takes slightly more pressure on a dying pump to starve the engine of fuel you need to pressure check the fuel system and check for leaks both fluid and vacuum too. 

And this is the unfortunate reality of turning an old car into a new car its a lot of money for almost nothing unless the car is a collectors item. You're always going to be behind the 8 ball unless you do something that I consider a full restoration like what you see on  PapadakisRacing's youtube chan but the difference is he owns a professional race team. I mention him because there's only a few reasons to do something like this. 1 your building a race car. At that point be prepared to for that car to literally bleed dollars. 2 You're restoring a classic car that collectors would be interested in 3 You're reviving a super old car think 1930-40's and you plan on driving it regularly all of these things are going to cost a literal TRUCK LOAD of money in parts alone. 

93 Silverado doesn't really fall in these categories unless this truck saved your life multiple times or something like that. At some point with projects like this the best way to work on them is one major modifications at a time go really slow painfully slow even and drive for awhile and at some point you to stop worrying about modding and just drive it. Tech is cars changing all the time so the only way to keep up is buying a good used truck. 

Was this problem present before all the work was performed?

By filters you replaced, does that include the fuel filter? There is a possibility that the fuel pump is weak. Has the gas tank, steel tank, been damaged?

You also need to check the catalytic converter for a restriction. This can be done by removing the oxygen sensor/s before the converter/s and installing a pressure gauge. you should have 1 pound or less.

You didn't mention if the truck had engine noises. If it does, the knock sensor could pick up on the noise and retard the timing. Try disconnecting the knock sensor and see if the engine performance improves.

Some engines had distributors that had a problem with the distributor shaft causing the ignition timing to retard on acceleration. If your truck has an ESC Spark Control Module, I believe, if memory serves me correctly, you should be able to unplug it and see if performance improves.

Does the check engine light come on? Have you checked for failure codes? Do you have a code 42? Things that could cause a code 42. Bad ignition module. Bad ECM. Wiring from the ECM to the distributor. A distributor rotor that does not have a RFI coating on the blade of the rotor.