Good shock for 60ft on 69 barracuda?

I have the Competition Engineering shock from Summit on all four corners and love them. This is on my 64 Valiant, I am running the 90/10 up front. They are all adjustable, and the 90/10's help with keeping the giant 8qt oil pan off the bumps. They can be had through Summit, and are very reasonably priced. I couldnt tell you how well they helped my 60ft, cause I did shocks and slicks at the same time.