Look very closely at the top of the carb with the air cleaner off. There is a 3 digit number on the carb which the auto parts people need. I used to own another Power Ram 50 I used to plow driveways. I got a rebuilt carb from NAPA a number of years ago. The carb number for my 1988 Power Ram 50 2.6 w/ auto trans was 430. That is the type of number they need. I will warn you the number was very hard to see and if someone sprayed the carb body w/ carb cleaner it might be gone. At the time, NAPA would only send back the same carb number you gave as a core because good carbs are in short supply. I was advised by the NAPA dealer this was due to coolant that circulates thru the carb body and corrodes it. I wish I could give you better advice on where on the carb to look but I don't have the truck anymore, underside so rusted from road salt in Northeast, I donated to the church to plow the parking lot.