68 sub on 1989 chevy truck frame

[Steve Kelly]

I was wondering I have a 68 sub on a 89 truck frame,Im getting ready to start on it.I was going to make a 3 door truck with a 90 bed on it.I was going to lower it 4 and 5in ,it sits high on the frame(2 wheel dr).Arter looking at some of these pics Im not sure whether to do that or leave as a sub.I would like to do somthing with the roof,they look really tall on these models,I seen one in classic trucks where they cut the top and layed the windshield back,anyone ever tried anything like that.