1965 413 Turbo

I wouldn't go out of your way to add a quench piston, it can actually hinder a turbo engine and produce micro detonation spots In the quench area.

Same with the heads, don't spend too much or go out of the way to have big heads and valves. The turbo is doing all the work. You can also unshroud the block with a simple bastard file. I did it on my 318 mag and it didn't take too long. Take some measurements and start grinding it away.

Not sure about the strength of the block and bottom end but turbo engines tend to be a lot easier on the bottom end than NA and superchargers are the worst.

The real hat trick you need to pull off is proper fuel and ignition control. I'm a big fan of e85