[Abe31968]

Here's pics first pic is of 68 set up waterpump is. Atwo groove crank is a 4 groove that what you need for alt.air smog and ps. I was trying to tell you about the small bolt pattern waterpump pulley.the crank is 2groove steel and a 2 groove cast outer pulley

The second pic is of a 2groove waterpump large hole pattern also that pulley is smaller in diameter .the crank is a 2 pulley steel and a 2 groove cast or a steel 1 pulley add on