Ratech Carrier Shims - GM 7.5" 77-81 w/ 3" Head Bearing, 80-98 w/ 3.125" Head Bearing 20600L Carb recommendations: Edelbrock AVs2 or

Carb recommendations: Edelbrock AVs2 or Performer Series 600-800 cfm

Excellent Resilience

Built-in two step rev control

this kit provides a quick and easy way to accomplish your carburetor tuning with the correct parts

Ratech Carrier Shims - GM 7.5" 77-81 w/ 3" Head Bearing, 80-98 w/ 3.125" Head Bearing 20600L Carb recommendations: Edelbrock AVs2 orRatech offers a complete line of differential service parts. Whether installing a new set of gears or making a repair, Ratech has just what is needed. Ratech wants all racers to know about The Myth that "All Shim Packs in the market are the same. They're just washer shaped steel that come in different thickness." WRONG! Ratech manufacture all of their shims in house on their own machinery. Ratech uses the absolute finest American made Hardened Shim