what calibration should i use?

[tboostdsi]

hi, i have a wideband first off so i can tune myself. i was wondering which calibration i should use. one thats close to my engine setup or one that matches my ecu. I have a p28 obd2b which is an obd1 ecu just with the conversion already on the ecu.
i have a b18c5 84mm bore dart block 9:4:1 w itr cams and itr crank
8lbjrsc
rc440
i/h/e
hondata s300 w p28obd2b
do you think i should start with the p28 calibration and of course tune myself first off by fuel trim and injector size.
thanks for all the suggestions and help!!!!!