i'll give an answer next week my 426 stroker is going on the dyno with a victor replacing the ported air-gap and 13cc dish pistons replacing the 23cc dish pistons should do better just cause the victor intake , it made 510 hp 560 tq with the air gap , so that 408 beats my 426 , but is that dyno calibrated properly ? those numbers sound high for that combo , mine had 2 inch headers bigger cam and an 850 holley on it made less hp and 40lbs more torque . i just never trust those magazine numbers
