I messed up guys, here's the story. I decided to do my plenum and a complete tune up. I went to the parts store and instead of asking for autolite 3923's I asked for ngk 3923's and didn't realize what I did till just a few minutes ago. So here is my question are they basicaly the same thing and will they work? I would hate to get everything back together and have a problem.

 

take them back and get the NGK ZR5F-11 plugs... or the autolites...