T&D Machine Shaft Mount Roller Aluminum Rocker Arm - 1.70 Ratio - BB Chevy Sensor Heat Shield As its predecessor is the

As its predecessor is the most popular ignition control used in drag racing

Clevite thrust bearings are made of Copper

An environmentally safe product which is compatible with all race track regulations

300" of shims under the spring

T&D Machine Shaft Mount Roller Aluminum Rocker Arm - 1.70 Ratio - BB Chevy Sensor Heat Shield As its predecessor is theProduct Description: Rocker Arm Shaft Mount 1. 70 Ratio Full Roller Aluminum Natural Big Block Chevy T&D manufactures rocker arm systems for over 400 cylinder heads and its products have established a reputation for the highest levels of quality, performance and long term reliability. The company works closely with leading engine builders to maintain its position at the forefront of technology. Add to this the fact that unlike some competitors each