How much would it cost to get a clutch replaced in a 1987 f150 with a 302?

i have a 1987 ford f150 and after three years of a sponge clutch its finally today started slipping so i am pretty sure i need to get one soon and was just wondering how much it would be or in an around the estimate of total cost to get this repaired at a shop?? i know the parts or the kit you can get for it costs like a hundred and seventy dollars...what would the labor for this be?