they were to close on my 1.7,s with sr heads,and i run 1.55 springs.i used minus .050 valve locks on mine to get more clearence.

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!