Here's a tip: with any cam similar to the gm asa cam (like jon@np has), sd tune it. it'll be a lot more stable.
also, i'm a big believer in tuning out mods, but with such a big cam, or any cam, it's ok to drill a hole in the throttle body. it'll stabilize the idle, keep it from surging, help the a/c load and a cleaner startup, just like we all did in the old days lol.
1/8" hole works well with the gm asa cam, as a start.

also, that cam doesn't make any vacuum, it idles around 70kpa, so a assist vac helps a lot!