installing a 90s truck 5 speed in a 67-72?

[BIGJAKE97]

i'm planning on installing a 90 truck manual 5 speed in my truck and was wondering if there's anything i should be aware of before i get started. i know a couple people have already done this. what fly wheel, cluth, and pressure plate should i use, the 72 or the 90 setup? is there any problem because the 72 engines have a two rear main seal and the 90 has a one piece? i know the 90 tranny has a electric speedo, can i change it to a mechanical? do you use a automatic croosmember? do i need to drill new holes in the frame for the tranny crossmember? what tranny mount do you use? i was thinking of using the 90 hydralic clutch, any reason i shouldn't? what pilot bearing? what throwout bearing? low or high hump cab? any help would be greatly appreciated! thanks jake