Prerunner 4x4 conversion

Hey guys, I've been mulling it over for a while and have decided I'm going to do the conversion. I have a 6 speed manual and I'll be using a transfer case from an automatic fj. I read a bunch of threads about this and I'm confident I have the ability to make it happen. Before I start buying parts I do have a few questions for those who know..
1. I am aware of the input spline count on the tcase is different than my 2wd transmission. Is it practical/possible to modify the transmission I already have or should I just pay the money to get a ra60f? Cost savings is the only reason I ask.
2. I've been driving around on maxtrac spindles and bilstein 4600's and I like my soft ride and height. Obviously when I add the front end I'll have to do something else for suspension lift. What is the softest set up with 3" of lift? I don't plan on wheeling this truck, just lots of winter driving and slick boat ramps. It's worth mentioning I have 400,000 miles and plan to reach 1,000,000. I love this truck and don't give a shit about resale value. Thanks to all you guys who share good info on this site.
Joe

 

Hell yeah dude, I’ll pull everything of a MT FJ Cruiser(non add front diff, transmission and transfer) locked the front diff and you’ll be golden.