go to mopar parts giant and type in your info, including vin or go to dealer with last 8 of your vin. have them give you a part number and they can also see if it is avail from vintage parts. if not avail, google search number or cross it at your parts store. i looked at mpg and it shows a 91 w150 to have old style kickdown rod. i have a 91 318 tbi w/518 od that i will look at this pm when it quits raining some. hope this helps.