1.8" in the front, 10 or 12" in back without any mods.
2.A frame wrap is when you take 1/4"(preferably)plate and weld it to all 4 side of the frame. Most frames basically c channel so you have to box in the frame (making 4 sided)and then wrap it. Hope this helps.
i wouldnt run anything over a 8"cylinder without any mods
if u trim the center of the frame and get a slip yoke drive shaft you can run 12s with halfstacks, but the car will be crooked when u lock it all the way up beacause of the panahrd bar