Hi Andy.
The '89's and '90's have a grey grille that
has rectangular openings and it is flat.
The fender baging that has the 150, 250, 350 model designation put the number in a "box" in relatively small lettering.
If it is a 4X4 then the wording POWER RAM will all have the same size letters.
The 89's had a RAM hood ornament.
Also a badge for the Cummins is on the tailgate.
For these years the SE models had a brushed aluminum accent panel that covered just the center 30% of the tailgate.
The 91's-93's have a smooth chrome grille with four openings and a black plastic insert in each operning.
Fender badging for the 150, 250, 350 designation is very similar to the new trucks in lettering style.
If a 4X4 the word "POWER" in "POWER RAM" will have smaller letters than the word "RAM".
There is no Cummins badge on the tailgate.
If an LE (replaced SE desigation) model the tailgate will have a large brushed panel with the word "DODGE" in black letters stamped in it. It covers more than 75% of the tailgate sheet metal.
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'93 W350 Club Cab, Bright White, 5 sp. , 130K, Factory Options: Bucket seats replaced with factory split bench, LE, 4. 10, Limited Slip, 7600 lb. rear springs, tachometer, front stabilizer bar. Mods: Banks stinger plus, Linex bedliner, 25,000 lb gooseneck ball, 10,000 lb receiver, Tekonsha brake controller, POWER WAGON injectors-WAY faster than stock!.