Rough running 350

[krigermoose]

I did replace the distributor. You may be right about that, I'll look into it.

And sorry, I worded it weird with the ignition coil. I just got a new one at one point because I thought the original one was bad and just kept the old one. They're the same, I was just trying whatever I could to eliminate variables.

[TexasRed]

If you're reading the right degrees of advance, then the distributor should be correctly installed. It usually gives problems where you can't advance or retard around top dead centre.

I was asking more if the coil was a stock style or the "high performance" coil. I'm not a big fan of the high performance (output) ones.

Why did you replace the distributor? Were you getting this problem before the swap?

[krigermoose]

I do have a stock coil and distributor I just got from Napa. Admittedly I originally replaced it when I didn't know what I was doing about a year ago, maybe longer. I can't even remember the exact reason.

Keep in mind this has been a very very slow project and I was working on everything else on the truck until now...

But before the swap it ran terribly for other reasons so I wouldn't have been able to tell. I'm probably going to pull it anyway and drop it back properly so I'm 100% sure it's not the problem.

[TexasRed]

Before you try the new distributor, I'd make sure your grounds are good. A lot of these trucks use the alternator bracket to attach the cable to the negative battery terminal. It can cause issues. I think I smoked an ignition box and a module in short order because of it. Both the box and the module were grounded separately to the battery and it still did it.

There's a decent write up by bd http://forum.73-87chevytrucks.com/smforum/index.php?topic=35756.0

[krigermoose]

Thank you, I will do that. And sorry to clarify again when I referred to the "new" distributor I was talking about the one I put in a year ago.