Thoes are good 915's. 915's are just not the greatest in this day and age as far as bang for the Buck (MHO). They'll be fine. I ran them on my 483 B stroker. MP 620 cam and a 950 Alky carb. They made power to about 5700 and peaked @ 550HP. TQ peaked @ 4000. Not enough head but run them if you got them.
