distributor

Best advice can offer is to find someone close to you who can help. maybe Junkyardhero of moparofficial
I say that because you've posted that computer is difficult and its no easier on this end of the screen for us if we don't know the specifics.

Second best. I'll give this a shot.
Need to first determine if this is a tuning issue or a parts and assembly issue.

In other words, is this DUI distributor its hookup failing or have a poor connection, or not hooked up right?
Or is it not setup correctly for what you have?

I can't answer that with the limited information but at least those are the two possibilities.
If it ran good before the changes, then go back to that. That's your baseline.

One more thing that will help is knowing what you are working on.
'74 Dart
with a slant six (225 cid) or a small block v-8 (such as a 318)? If its a six then we'll want to move this to the correct forum to reduce confusion.
Then your wrote "tri-power". That usually means three 2-barrel carburetors, and is a Pontiac phrase. Chrysler called it a six-pack. Regardless. if this is on a '74 slant six or a v-8 it suggests some hot rodding under the hood. The tuning will be different than a stock engine.