Remove two bolts, cut both wires, remove old unit. Bolt in new, splice new to existing leads.
In other words real easy, except for taking the Dextron shower.
I used the 700R4 solenoid last time, purchased from NAPA, its a little longer so it has bushing that come with it. Might as well do the filter as well.
I guess if I am going this far then I might as well put a shift kit in. I put a cheap B&M in my Buick with great results, is there any that would be better.