k5ontherocks

i am building a mud truck with 2.5 ton running gear and 53" tractor tires,so im a little different build than most of the guys on here.
ive got a 2004 5.3 engine im wanting to mate a sm465 transmission to this.

i know bellhousing will work,but what else do i need to make this swap happen.??ive searched and had little luck on which flywheel and clutch stuff to use.also wondering how big a clutch oi can put on the back of a 5.3,will a 12" or 14" clutch fit??
any help or direction is greatly appreciated.

heres my build thread.
http://67-72chevytrucks.com/vboard/s...d.php?t=221935

thanks
andy