Question about Transmissions

[Kevin.A]

This is what i understand, and I'm asking if this is correct.The RB25 Transmissions will bolt right up to the RB20 block, however it is longer from bell-housing to shifter.The Z32DETT will bolt up to the RB25 bell-housing, and is even longer then the RB25from bell-housing to shifter.

A KA24 will mostly bolt up, but may miss a bolt hole, it's shorter then the RB25 but longer then the rb20 from bell-housing to shifter

People have tried to bolt up 6-speed Z33 transmissions but have not had much luck.

Can someone confirm that so far i've not made any mistakes in compelling my information.

Lastly the question.I've read mixed things about the RB20 Transmission, about how much horsepower can i hold on stock internals, and does anyone make better gears for it?

ThanksKevin A