i use them in my 580".i switched from 1.55,s and it really woke the motor up.i'm trying a set of 1.7 t&d,s on one of my 500" motors.i hope it wakes it up too.the downside is more wear on the lifter/roller,the rocker arms,and needing to use stronger springs.


68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!