Do a search here on 4bt's there are a few already. Also make sure you poke around http://www.4btswaps.com
lot of good info there. If you are not inclined to build your own mounts there is a member on here that sells Farm Strong motor mounts. Not a fan of the fluid mounts from the bread trucks or the ones from Jeff Daniels either for anything that will be used off-road.
With 33" tires you will not want much greater than 3.55 gears especially for the street.
Just remember this is a very large heavy motor. Make sure your axles are up to the challenge!
Good luck on your build, I'll be watching.