Will GM 200r4 work with factory floor shift location?

I've built quite a few of the 700r4 & 200-4r. For your application, I'd suggest a boost valve to help up the pressure and a good set of servos. They don't cost a lot and are good insurance the trans will survive. The ones I've used has ranged from fresh builds with all race internals to just pulling one out of a used car and installing the boost valve and servos. That combo will allow a little more room for error with adjusting the TV cable too.

I'm out of town right now but can send part #'s I use when I get home if you like.

I've never not used the lock-up function though, I'm curious to how it works for you.

Cool set-up, good work!