1990 Chevy silverado Z71 5.7 TBI EFI, vortec heads with CSFI conversion. NEED HELP!

[Aksl]

Hi everyone, i have a Chevy 5.7 pickup, i decided to make a vortec conversion, with vortec mainfold and CSFI,as well as PCM/ECU black box. Decided to leave my trnsmission 4L60, and all the dashboard in it`s original state with all the in cabin wiring.

So i fully restored the engine, sandblasted and painted. Installed KB flat top pistons, comp cam 08-467-8, and all the vortec top, mainfold and spider injector.

After puting it all together, setting up all timing marks: Crank, TDC, Distributer (my distributer does not have hall sensor, only cam position sensor), and starting the engine up, i get misfires in the exhast, and by cheking with timimg light on crank, i misout 13°-15° earlier.
So my question is, how to solve this issue, is it possible by adjusting through PCM/ECU Black Box the map sensor, to get a reasonable ignition spark timing? (or what else can i do to solve that)?

Second issue, i havent pluged in the gear box, for the PCM/ECU to recognize it, i wonder wht are the wire colors in dashboard, and to what plugs ant pins i should cconnect them to in my black box pin out?

At the last, i have taken my PMC/ECU to programmer, he has unsoldered the chip and soldered an addapter for the chip, so it can be taken off easialy, reprogrammed it. If i want to play with it myself, what softwear and pc link connector do you recomend me to use to programm it. Can i make a setup, like you guys do with the 411 PCM, where a usb cable is comming out of the PCM for direct programming?

Thank you all in advance for help!

Sincerely.