its very easy. Remove the old shifter and reverse the process.
4 bolts hold the shifter to the trans. RTV the new shifter face to prevent leaks. Make sure you poke the shifter shaft into the hole in the linkage rod.
If you need to adjust the positive stops simply put the shifter in 1st gear and run the stop up to the shifter and lock it down then put in second and do the same adjustment.