Thats a great write-up. I like the format that you used with the text and the pics. So many only have text and it's tough to figure out what people are talking about.
I want to add something about the tranny mount. Looks like your solution might be a great temp solution but, I think with the kind of real fun, power, and punishment your going to be putting to thru there I would suggest at the least some grade 8 bolts. But, really a better mount needs to be made. Maybe putting some tubing or pipe of the right size in the ears of the orginal mount would help it to not move around and last longer.
If you came up with a good mount you could sell it as an add on to the kit.
I only add this because I'm sure you drive your car like I do mine and that thing is going to have some real stress on it.
Please, update us as soon as you get the driveshaft in and can give us a driving impression of it all.