8.8 swap questions

I went over and rear all that in the 8.8 thread. I still have a some info I'm missing.
1) does the 457 u joint fit the factory Ford flange yoke or do you have to change it?
2) does this require modification of the factory a body driveshaft?
3) what shock mounts are you using?
4) what spring perches? Will any 3 inch perch work?
5) where did you find that pipe cutter? I looked on Ebay and they arent cheap the cheapest no 3 I have found is around 100 bucks.
6) when you welded your spring perches on what angle was the pinion at? This is a major concern for me.