How about a good Drag race 904 build discussion

I am just going through my custom built by me rollerized 904 and am contemplating some possible changes.
I currently am using four pinion steel planets.
Has anyone used a three planet rear planetary with a brake and some significant horsepower.
I also run an aluminum front drum.
Anyone who has built their own trans care to share some specifics about the internals of their build.

Duane