Newbie with questions about my 66

[HSkinner]

Well, here I go again. I recently picked up a 66 long bed 1/2 ton. It's currently set up for a manual trans but the trans was removed. I'm thinking about putting a 700r4 in it. Do I have to change the pedal assembly or just remove the clutch pedal. Also, the front end already has 83 suburban front A arms and disc breaks but the rear is stock. so I have 5 lug up front and 6 lug in the rear. I have a 1/2 ton rear axle out of a mid 80's burb but is there an easiear way to change that axle to a 5 lug and keep the factory housing? Also, I read a really good right up on shortening the bed and frame on these trucks but I can't seem to find it again. Thanks, Heath