figuring compression help needed.

All I have is the engine right now, I build it with all new mopar performance parts, kind of old school, took me 2 years to find it all, getting very hard to find, built it as outlined in mopars hustle stuff speed secrets for a 13.5 second car, I would like to put it in a 1974 dart sport, I would use a built 727 trans. with a low gear set and a 2500 stall converter, a 8.25 rear end with 3.55 gears and a sure grip, I think it would make a good street/strip car.