...there is a compression ratio calculator at www.campbellenterprises.com ..... just put in the bore, stroke, deck height, head cc, etc and it gives it to you.......
Also there is a web site but I don't remember what it is that gives examples of different engines with the HP/TQ. Tells the parts to use, PROVEN combinations. Thats the 'key', build your motor to where you KNOW it'll put out what you want.. Oh, someone elso on the board will remember that web site r/e engine builds..... bill