I purchased a 69 Mach with a 351 cj that was pulled from a 72 Torino. I was told it was bored .30 over,sonic tested, heads were reworked and made to breath. No compression numbers given. While looking through reciepts from the rebuild one reciept concerning cam work stated "Lift .516 .519 Duration .288 .290.Knowing that little bit, is that enough info for someone here to estimate the Horsepower range? Having driven a 70 m-coded Mach for eight years, to me this car launches like it must be somewhere north of 300 hp. Also what cubic inch would the engine be now?