From everything I've seen the Road Star drops horsepower and torque after about 5150 rpm.....

I hope you have someone there that can translate this for you.....

You're problem is not that you compression ratio is too high. The decompression circuit keeps the valves open just a little bit which allows compression to be released.

The problem could be in your valve train, decomp cirucuit, and that is pretty much it. If you pull the plugs and the motor rolls over then it has to be valve train or decomp. Take off the valve covers, remove the plugs, do the valves open and close when you hit the starter button???? Now, make sure the push rods are not bent, if all this is ok then see if you can push the rods in that are in the end of each cam (remove the cam over)...they push hard, like spring loaded....

Also, do you have adjustable push rods????