Doubt youll ever hit 200hp. That number and the kent dont like one another from what ive seen.
But yep some low compression pistons the standard ones for 1600 are like 8.5 or 9.5? you could run mild boost on stock internals
Id be looking at forged low comp pistons, rods and crank if you want serious power if you have thousands to spend on machining, porting and components.
Id say youd be looking at 130 to 190 bhp for a road going kent turbo although ive only seen them putting out 150 max
Id look at injection too unless you want to have a suck through carb set up