Since you are going with a custom piston you can order it with a large enough dish to have a low compression ratio using the 66 head.
You will need a piston with around a 10cc dish.
I don't see the need to cut off the intake log.
There's not enough to be gained with the small head and also considering the small turbocharger won't support high flow.
Instead do as much port work as you can and see about installing a larger intake valve.
Then open up the carburetor hole and mount a Holley Super Sniper two barrel throttle body injection unit.
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Then use an intercooler and consider running more than 10 lbs of boost.
The Super Sniper will support up to 21 lbs of boost.
Use the Holley Hyperspark distributer.
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Along with the Hyperspark CD ignition
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And the Hyperspark Coil.
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