Lock the timing. Be it Dizzy or computer controlled.

To lower compression, you can open up the combustion chamber. Simple, cheap and easy.

Ridgecrest will do a copper head gasket up to 3mm if you want to do that as well.

I would look at a reduced boost setting.

Open your ears to detonation. . . If it detonates, back off and dig further. . .

Once everything is running sweet, start winding the boost and timing in. You should be able to here a change in the "song" of the engine before detonation hits. This is when you wind a bit of boost/timing out.

Better off a few HP down then a few engines down. . .