where I can find any information to properly tune the pcm, we put a set of fast 85 lb #30857-1 injectors, and need the offset timing vs battery voltage table to properly do the work

 

I doesn't exist, I would mod the tables to pump out about 1.8MS per side.

 

doesnt exist...
you can read teh part # off teh side, and do a google search...
then when you find out the maker of the injector(which is most likely a bosch or a siemens deka injector)
you can search for injector data on their website...

it wont be a GM table you can just enter... but it will give you enough data to get started and fill in some blanks to get in the ballpark

and then you can go in and tune the tables

you have to start with known data, with stock injectors
then you change nothing except for the data in the IFR table, and work around your new injector data that you got from the makers website.

you can get close enough to be a good tune...you wont get perfect without lots of data tests on specialized equipment and them lots of time on a load bearing dyno