The reason I asked the question is complicated but I bought the project with a motor and fuel system it came with. It has an edelbrock port injection and the calibration must be matched to the camshaft. The calibration is for a cam in the 230 - 240 duration range, thats the reason It should have that cam. I can't get to run well, meaning it wont idle unless I skew the vacuum to the map sensor. The map at idle must see no more than 14" or it will become to lean to support combustion. There are no vacuum leaks anywhere and the timing is close enough to at least idle. So when I skew the map it will run making a true 20" of vacuum at 800 or so. There is no O2 sensor installed and its been taken out of the map. The engine may not have that cam and if so that is the reason its running lean. My thinking is if the ecm is mapped to a larger cam it will want to see lower vacuum at idle. A higher vacuum given its calibration would indicate a decell event or something. I am just putting thoughts out there at this point.