The comp is a good cam. The edelbrock is ok, but they seem to be having some hydralic lifter problems. I know of two persons who bought that cam and lifters, both had some lifters that would not pump up, and had to replace them.
Lunati has a really large selection of cams for the small block chevy. GO to their web site and look up the available cams.
I liked my isky cam I had in my 355 69 elcamino. That motor screamed and sounded great too. This was along time ago but I used their 292 adv. duration 510 I think the lift was and it had a 108 degree lobe seperation. That motor would turn over 7000 rpms pulling strong the hole time with no problem. It was a hydralic grind.