Probably 100-150 of soft miles. Been up to 70mph for about 2-3 miles. Without the trans coolers hooked up I've kept trips to a minimum. I don't know how fast the 4R70W can overheat and don't want to change it. But enough to know the gears work properly.
I've got the speedo figured out, just have to fine tune it a bit. I'm using a Dakota Digital SGI-5E. Tap into the rear differential mounted speed sensor circuit as it goes into the ABS module and it gives the correct output signal that I just piggyback onto the wire in the 42 pin loom. Just have to get the ratio dialed in and it'll read correctly. When I first hooked it up, before the settings were adjusted at all, it said I was doing 90mph in my parking lot. That was interesting.
Going to try and get the speedo completely wired in and figured out and also get the trans coolers plumbed, spent an hour hunting for fittings last night at the parts stores. Now just need to find a place that actually has 3/8 hose in stock.