The kit rear rag joint will fit I had to leave one bolt out after every two and even then I had to kind of finagle it into the spokes, I don't have any pictures for you unfortunately but it will fit. So count two bolts, leave one out, count two leave one out etc you will have just six bolts. I never had a problem with it wobbling or coming loose with just six bolts.
I did manage to get the kit tank to fit sorta by bending the bolts out but I really really wouldn't recommend it. I used worm drive screw clamps to hold my tank on now although its not the kit tank so Im not sure if that can help you. Finally yes you will need 7/8ths handlebars with a 1 inch spot in the middle for clamping them on, I use wald handlebars good price, strong.
I can try to answer any more questions you have. Good luck with your 29er! Its a great ride with the big wheels.