what should a 73 monte carlo idle at roughly in both park and drive? my cousin;s friend's is idleing about 500 in park and 250 in drive.

Automatics should be about 600/750 in drive 800/900 in neutral/park

thanks, that is what i was thinkin

250 rpm in drive?? Dang, It's shocking it will stay running at that low of speed.

I set mine to around 700-800 in Park, and it drops about 100 rpm when I put it into gear