Round up a 1/2" impact gun, it makes the job so very much more enjoyable. I like to pull the rad, just to get it out of the way, a 1/2" impact gun and socket will just fit in the space. Its right hand thread and it will be an absolute bear to brake free.

1987 trooper LS.'94 3.2, SAS,35's , lots of dents and rust. Now, improved, with more dents.
1995 trooper LS. Wife won't let me improve this one.
1996 trooper. I'll need something to modify when the '87 finally rusts away.