k20a transmission

I Have a 2005 USDM K24A1 And Ive heard from 2004 TO 2005 The Block/ Tranny case's changed and you can not mix macth them. As for example, I can Not use a 02-04 K20A2 Trans on My 2005 USDM K24A1. Is this True??? I was looking to Pick up this Setup from ICB...