Well the only reason I put a cap and rotor on is because the shop that worked on my car befor ( had engine rebuilt after I bought the car, basically stock rebuild though) didn't put the crank pully on right and it came off and hit the opti and it shaved itself down to where it wouldn't run. I'll get some new o2s and plugs and try that out. Might be a few days. News to get my truck back up first. Had a blown head gasket.

 

For some reason the Bosch O2 sensors and the LT1 motors don't get along. I had two on mine when I got it and they were both giving terrible readings and they would 'stick' at a certain volt reading as if they were totally inoperable. I pulled them, replaced with Delphi plugs which I think were only about $10 more and they were perfect. Have since seen many posts stating the same problem with Bosch O2 sensors, so now I know to steer clear of them.