If the engine has been sitting for a long time the rings may have bound up - this is actually reasonably common.
Try this:
Pour a small amount of oil in through each spark plug hole.
Let it sit for a while (~10 mins).
Crank her up.
You can expect it to be pretty smokey for a while but should settle down after a minute or two. In many cases this can free up bound rings and get things going again.
If not you can send me the head and supercharger pipework