I may have some time over the holidays to try bench flashing a PCM with your COS tune. This would then be a little easier to make changes to your tune.
So far I believe that you are running a 406 SBC with 24x / 1x setup, using 8 LS coils, a 4L60E transmission, 2.77 gears (or 2.73 ?), and 225/60-15 tires.
Need some additional information to try and get you a little better "start-up" tune.
Fuel rail - return style or returnless style ?
Fuel injectors - from what ? (part number is the best, if you can read if from the OEM injector)
MAF - Yes or No ? (if yes, from what ?)
Knock sensor - one or two ? (from what vehicle, and how are these setup ?)
Transmission mounted Gear Position Switch - Yes or No ?
Electric fans - Yes or No ? (if yes, one or two ?)
Thermostat - 180 F or 192 F ?
If you are not using a MAF, you will still need to use an Intake Air Temperature (IAT) sensor.
Looks like your camshaft has a 110 degree lobe separation angle, which is not PCM friendly at all. Comps Cams comments for your camshaft - "Computer-Controlled Compatible: No".
Typically with an automatic transmission, the minimum advisable lobe separation angle would be 114 degrees. Fine tuning the idle with that camshaft is going to break your heart (and maybe your wallet !).
No promises, but I will try and get you something a little closer.