Plate 70n 60f 5.0 fuel flowing Direct port .036n .026f 4.5 flowing Timing with it all on.... 8*
Reason for the low timing was the cam was not that nitrous friendly.
The real tuneup is give the motor what it wants, the right amount of fuel and timing. You need to be able to tell what it wants. Too much timing always hurts parts. So always retard it first, if adding timing doesn't pick up mph....you went the wrong way ! Baby steps