here is the Holley 670 Street Avenger on... you can see in the pic, also had to get the Holley TV/Kickdown cable bracket (p/n 20-133) and the Holley TV cable geometry corrector (p/n 20-121). The truck runs much better than with the Edelbrock 750 that was on it.
I did have a hard time getting the timing correct - come to find out, my balancer has the timing mark straight up at 0 deg.... so, I lined everything up then backed it off about 12deg (with my precise eye) and then adjusted the carb and she is ALL G!