Can't get it to idle right! (Part 2)

I know this was a grude way to measure a cams lift, but is this cam as wild as it apears? I want this car to be a driver not a track star, if this is the case i think I'm going to switch out the cam. Again I knew very little about this motor when I got it it was a good deal, it was in a beat up Duster and I think the person who built the motor was going to bracket race it.

If you could get a dial indicator on the rocker or take the rockers off and get it on the pushrod you could get an idea on lift. I have used 2 solid cams in my 340, I have the .557/296 MP solid in my 340 now, it will idle down to 500rpm if I wanted it to. The other solid was a .508/280 MP cam and would idle down the same.