Don't really know but I just had a .030 over 440 engine dynoed on Friday. It has 11.5:1 Ross pistons, Eagle crank & H beam rods, solid lift cam (lost cam card), roller rockers, Mopar high rise single plane intake, 1,000 cfm Holley dbl. pump carb and a set of Indy SR alum. heads and it made 591 h.p. & 590 ft. lbs. of torque. I'm simply guesssing yours will be in the 450-500 range, depending on any work done to the heads, compression ratio, etc. Probably plenty of h.p. for the street but I still don't think 275's will hook up. DOT slick are gonna work better. Have fun with it.