+1 without the documentation it will be hard to get more than ~12K, if the compression and leak down are good. That said, I agree that the cost of building these little displacement motors is 25-30K (it is what we paid) and most build 3.0’s to get the HP/$, but the sound and throttle response is unique.
Dream car
A stock 69S 2.0 MFI in a narrow body 914-6 conversion