1/4" Phenolic Insulator kit 1957-58 Tri-power Engine Performance Kit has the three large

Kit has the three large air cleaner bases

Picture is of linkage for GTO

J shaped bracket to attach to center carb

These are not same lines you buy from the other guys

1/4" Phenolic Insulator kit 1957-58 Tri-power Engine Performance Kit has the three largeThis kit also fits the popular 348s, and Olds J 2 as well as the Early Pontiac's. If your tripower has three small Rochester carbs, this fits. Kit includes three precision cut insulators, set of 12 studs and new, plated nuts. Studs are made for this application not a generic piece. Studs have the correct 5 16 18 threads into intake and 5 16 24 up on top. Kit includes 6 gaskets, which you will need. Solves issues with fuel boiling in the bowls,