360 Advice Needed - Autocross / Street Engine Build

"With the 3.91 gears, you are already going to be able spin tires at will in 1st"
This is the part that I'm trying to figure out... The previous build was a mild 318, and traction was already pretty limited in 1st.

Getting a bit off topic from the engine build, but:
Would 3.23 gears and an 11" converter be a better combo?

Street tires only allow for so much of a holeshot at traffic lights, and one the track / autox 1st gear may be useless?