I still think you're under geared for 38's with a 4.0, I've built a few mud buggies and pick ups in my day growing up in south Florida and 4.10 were minimum even with v8's
He's an angel dressed in oilskins; he's a saint in the "Sou'wester,"
He's a pluck as they come, or ever can;
He's a hero born and bred, but it hasn't swelled his head,
For he's just the U.S. Government's hired man.