The main reason for the strip down was to fit an HKS metal gasket (requires a head and block skim to get a near perfect finish). With one of those the sky's the limit for boost. In practice, though, my motivation is to make a robust engine rather than a particularly fast one - that car's an auto after all!
I ordered a "low mileage" Jap import engine today. There aren't many around and I think I trust the supplier about as far as my car can go without an engine. Crossing fingers and other extremeties!
Rob