I drove a 3.5 DI rodeo back in 2004 and I couldn't tell much diffrence over the dohc 3.2 but at least you don't get the 4l30e with the 3.5.

94 Rodeo 3+3 lift Red)
95.5 Rodeo 1" Body lift Dana 44' front & rear 4.88 gears 35"s 176,000 miles Optima Yellow top InexAir Co2
front winch bumper custom rear bumper, Hella 500's
2004 Silverado duramax