I have the LT1-style in my Camaro, so most of the cross-swapping stuff from your other post isn't of use to me, but I have seen the other upgrades you mention as part of the build options for a Tick Performance rebuild. I've thought about doing that down the line, before I add nitrous. My 383 will be about 550hp N/A, so I think the stock 48k mi trans will live behind it. But I think some nice, violent nitrous shifts would probably do it in.