Yeah mine is a lockup unit triple disk as well. It's actually a 3200-3600 stall
You will probably need to get your lock up settings adjusted, and shift points modified to take advantage of the higher stall speed. I think you will be very pleased with that size converter.
I was told by a reputable builder never to lockup at
At you're power level, I agree whole-heartedly. Locking up is going to be way too harsh on the trans internals. I've always heard it was okay for cars below 700rwtq, though. Silverfox makes a built trans that I'm looking into buying, and it pretty much comes with a disclaimer that you shouldn't lock up the converter at WOT above a certain power level.
I don't have any data to back this up or anything, but I did work hand in hand with Circle D to pick out a stall converter with strong enough internal clutches strong enough to handle being locked up at WOT with 600rwtq or so, which gives me room to grow in the future.
I feel like that is a reputable company, and they wouldn't have worked so hard to help me spec out a converter if it was going to self-destruct later on down the road. It has survived several dozen track passes, and probably 50 WOT pulls on the street so far, though.