[olddog]

The cam I am running is the same lift and duration. I think that is the same lobe seperation angle, too, but I would have to go dig out the cam card to be certain.

It is in a 347 stroker (5.0 block), with Mass Flow EFI. It idles good at 900 rpm. It will idle down to 600, but it sounds like crap. Engine doesn't smooth completely out until about 2000 rpm. It still pulls decent down to 1500 rpm, but not strong until over 2000. It pulls strong all the way to 6500 rpm (rev limit). By the seat of my pants I cannot feal any loss of torque, which is how I have hit the rev limit a couple times, as I do not want to turn it that high.

Previous owner (who had the engine built) told me he origonally had a carb on it. He said the EFI calmed the idle down a bunch.

With that said the extra cid in your engine should tame the cam a little more. If you have good flowing heads, I wouldn't think you would need any more cam for the street. I would not go any higher on the duration unless I wanted to turn higher rpms, which I wouldn't do.

I am not an expert. Many people around here know more than I. Just thought my engine would be of interest to you.

PS
I was told the static compression is 10.4:1. It runs fine on 91 octane pump gas.