E85 + 1100CC Injectors

I went with L2 Fore Triple pump return system and DW 2200cc injectors. My tuner said those will idle fine and would have enough capacity for anything that I will ever want to do.

My plan - Hot tune with E85 for street driving. I do not daily drive the car. It sees maybe 100 miles a week.
2nd tune: Very aggressive race tune using E112

Question: What upper pulley sizes do you think I can go with on the tunes?

2016 M6 Narrow Body Challenger

Currently I am spraying straight methanol - 872 whp.

Mods include 10% lower, 2.95 upper, cat delete, B Woody CAI, JLT Catch can, 180F Thermostat, pinned crank.
Supporting Mods: DSS Carbon fibers drive shaft, drive shaft safety loop, DIRS differential brace, 1400 hp axles, 17" bead locks with MT ET Street/R,

What are you guys doing on the modded M6 transmissions?

RSG is one that a few like
Tranzilla?
There's another I believe - Tick Performance?

I would really like to find a used M6 tranny to send out an have built... If anyone knows of one... Let me know??

I am running the McCleod 1200 hp clutch. Not a fan so far, but it hasn't slipped at current whp.

I've looked at the graphs.

If a person leaves their rear diff stock at 3.70
Would it make sense to run the 2.98 / 2.1 / 1.43 gear setups?
If a person goes to 3.90 rear diff - Is that too low?

I'm running 305/45/17 MT ET Street/r