Texmo
Your carb is a 1979, federal , chevy, auto carb. Carb was built on the 248th day of 78 The letters are a plant code and that I cannot help you with.
Hope that helps to get a carb kit with more than over the counter parts get in touch with The Carb shop in Eldon Missouri. I bought my kit from them and the kit was much better than a over the counter kit.
P.S. buy the throttle shaft bushing kit really it is a must as the stock plate has no bushings and they are prone to being sloppy and creating a vaccum leak.
