Bottle Rocket into the 8's in the 1/8 with slipping clutch

Mopar Sam said
What transmission do you have? If it is a regular 4 speed 2.66 1st, and you go to the OD 4 speed with 3.09 1st, that will take you from 14.0904 to a 16.3682 SLR.

I have a 3.09 non OD box. That, with a 4.56 gears puts me at 14whatever I said above.

If I change to a 4.88 then I’d be at the 15 SLR I need.