Carby Kit: 77-79 Firebird TA 400 w/ Rochester 4blThis is for the 77 79 Pontiac Trans Am 400 & 350 PONTIAC V8 .. with the original 2 & 4 bbl Rochester carby.. its a standard carby kit. They are NOT returnable so we need to be sure that the numbers are correct. [b] The carby #'s that are correct are: [ b] CARB. TYPE: R 4 Carburetor Type: Model 2MC, M2MC, M4MC: CARB. NO: this kit fits.. 17053995, 17054598, 17054826, 17054827, 17054828, 17054829, 17054830, 17054914, 17054915, 17054958, 17055048,