Bolt-Ons are coming...trans upgrade?

[LS-K]

Well after having my LS6 swapped 82' K10 SWB running and doing good for a while, I've gotten the itch I'm sure many of you have gotten after you had your swap running.

I've decided on going with a TSP 228R, headers, Yank SS3600 combo. Of course I'm upgrading valve springs, retainers, pushrods, oil pump, and timing chain.

I'm already running a stock 4L60E/NP208 behind an 05' CTS-V LS6. That's an engine with a factory HP rating of 400. Now discount the HP loss in the drivetrain and add the bolt-one and a tune and it makes me wonder if the 4L60E will hold up. I'm only hoping after a good tune I break the 400hp mark at the wheels.