'92 Extened Cab 2WD Ideas and Questions

Acquired a '92 Extended Cab 2WD Toyota Pickup and I'm going to build it up quite a bit. First build of a newer 2WD and first Toyota. It has a stock V6 and an Auto Tranny. The pickup sits fairly low, so that will remain the same. First to go will be to get rid of the seats in the back and switch out the front bench with 2 buckets with 4 point harnesses. Possibly put a bucket with a four point centered in the back.Keep the sound simple with 2 Audiobahn 10's and some good 6X9s and somethin for those highs and a decent CD player. Get all the body work done on it, throw a roll pan on it and get something like a flat canary yellow sprayed on it. Almost like a primer. Throw some 17s or 18s on it and then to the questions. This will be a daily driver, but it will be a sick ass daily driver. The big question I have is: How hard is it going to be to drop in a 2JZGTTE Twin Turbo and Auto Tranny out of a Supra? What kind of problems will I run into? Will I need to beef up the rear end? I will most likely gear it out to somethin between a 3.90 and 4.10. Is there a better gear ratio I should think about? Would I be better off just stickin a whole new rear end in it? What kind of top speed you think I will get out of it? Might also put a Supra guage cluster in it and Supra emblems on it. What's everybody think about this idea? What should I be concerned about once it's done besides speeding tickets?  

I'd probably go with a new rear end. Either a Ford 9-inch or GM 14-bolt. A hot-rodded 2JZ turbo will produce LOTS of power, way more than the stock rear end was designed to handle. Some people might think those axles would be overkill, but I've seen those engines put down more than 600 hp on the dyno in automatics!