1000hp 727 full manual build

Hi

Yet another build thread from my side, this time it will be transmission.
What would you guys use to build 727 that can live behind 1000hp nitrous combo street strip Duster?
Car weight is 3250lbs with driver, engine is 500ci 12:1 solid roller dual dominator tunnel ram combo with small wet shot. Dana 60 with 4.10 gears, 29” tires.
This will not have trans brake, but it would be good to build it as if there was one to have extra durability marigin.

What I wanted to get:
- Billet steel front drum (a&a that takes standard piston) with Sonnax piston and full set of springs with billet retainer. This takes 5 frictions I think.
- Billet steel front planetary 4 pinion rollerized (a&a)
- 2.28 1st gear with helical gears fully rollerized with billet alu 4 pinion planetary (a&a)
- Reverse manual vb high pressure a&a or crt with high flow filter and 4.2 lever (also have 5.0 if better choice)
- Deep cast aluminium pan
- Teflon rings
- Sonnax front and rear servo
- Rigid front band
- Stacked cooler with fan
- Bolt in sprag
- Converter will be custom built to spec

Did I miss anything besides thick wallet?
I am trying to save some cash if there is room for it, so didn’t really plan to buy non essentials.
Is light sunshell worth the money?

Thank you in advance for all the insight.
If you have some good used parts I could use for this, please send me PM.