1989 cutlass supreme 2.8

My car was cutting out or when I give it gas it died out. Had to let up on gas pedal. For it to stay running. I went and got new plugs and wires. I changed the front 3 plugs. 2, 4, and 6. I had to move the car. So I put everything back together. I went to start it up now the car will not start. I checked the wires. ( only removed 3 ) Wires checked right. Checked fuse's all are good under the hood. I am at a lost. Can anyone help please. Thanks in advance.

Do you have fuel pressure?

I have gas. But did not check pressure. Will do that. Got to get a gauge. Let you know tomorrow. Didn't think about that. Thank you.

The fule pressure is at 40 psi. Should it be more? Or should I check more. Yes I have spark.