i've was thinking about the same thing.... what you can do is call Jegs, and they will fax you a set of blue prints for the 8 point cage (this is the one you need). The sheet will list the tubing of 2&5/16 that is something like .134 thick... follow the prints to have the pipe bent, and if you dont want to have holes/ plexiglass for the rear window, just pitch the rear bars. YOU WILL need to use the front angles that require you to "jump" over when getting into the truck. I'm not sure about the 2nd gen, but you might need to modify your door pannels too...
best bet... keep using the 3 point!
chris