I know, my transmission guy "Top Boy" has those 904's humming behind some really good street small blocks in our clubhouse.
I never thought they could survive, but he knows them inside out and with a lot of stock parts that he combines to make for a good piece.
To bad a 04 won't snout up to a big block that easy.

Rick over at A&A said to stay away from aluminum drums for a street/strip car. not worth the band adjustments and wear. I also stood away from that lightweight titanium flexplate.

What's up with some Titanium or T-aluminum convertor development?
Might work if someones got the time and skills.LOL.