I think you only have two things to answer: one is the K30 portion, since the frames were a bit different. Only isue is if the shackles are in a different location than the K10/20's, did you read this whole thread to see if anyone has used them in a K30?
Other concern I see is the 4L80E. I don't know enough about them to know if the shift linkage is in a different location that might be an issue. The way the 69830's dump though, I'm guessing the collectors are far enough "forward" to clear. See onetonbb74's pics above. Only issue here would be if the shift linkage is somewhere else other than where the 700's is. I'd expect both to be in same location, but I can't guarantee that.
Should be no fitment issues if you can get the above two answered.
Ive read all of this & many more.
As far as I can tell shackles mount in the same place.
The 4l80 is a little longer, the linkage is only set back an inch or so farther back.
I'll probably order a set here pretty soon, I was just hoping that someone had done this already & was willing to share the info.
Thank you for all your help so far.

. There's no fuse in the starter wire so it melted the terminal out of the battery. Had to get it towed home. Got it all fixed, but had to buy a new battery. I feel like a dope for not checking ahead of time. Just a common-sense warning for others.
. It's only half welded. Summit is sending me a new set.