I used the stock manifold gaskets.... always they are awesome!!! I'm going to go pull the spark plugs now.... and have a look at them on bank 2... everything on bank 1 is working fine

I put new wires on
I put new spark plugs in.. Delco replacements


If you get a universal swivel and a long extension you can get the #7 and #5 in from under the hump from the top of the truck with no problem

 

okay I think I nailed the problem down today.... First off I want to thank you guys for your ideas and suggestions always great to have someone else with similar issues and experiences.

before LT install everything was running fine.... had some small exhaust leaks on start up from heads headerbolts snapping off but those sealed once engine was warm so I decided to install the LT since i had to take the manifolds off to get the broken bolts out.... or just needed and excuse to mod.. SS 304 headers and y pipe for 300 bucks... how can you not take that deal....... I won't tell you how much the headers cost for my vette!!

I pulled #6 plug because this is were the scanner said I was having the misfires at.... looked brand new like its not burning anything!!! went to autozone and swapped out since they have a lifetime warranty on them!!! verified plug fired with extra wire hooked to #6 coil.. looks good.

Re-torqued header bolts just to make sure there are no leaks....

installed... same issue..... this leads me to believe the injector is not supplying fuel .... I pulled fuel rail took injector #2 out and swapped it with #6... I looked at #6 and it was nasty.. so I cleaned it a bit............ put it back in and BANG everything was working smooth...... no misfires and NO HIGH LTFT in BANK 2 I'm Using the OEM O2's they seem to work okay same on each bank I'm sure the vette rears will work better but for now I'm going to go with them

 

Good job. Glad you found it. Swapping parts around is always a good trick.