piston help

I just built a 12v with an hx35 ht3b setup. I was told a while back that the 3908815 was a good industrial piston to use i had the machine work done and a bran new cummins head o ringed. I then ordered a set of 7x10 sac injectors with a 155 degree spray pattern. Can anyone look at the pic in the link and tell me if these are "big bowl" pistons and should i have gone 145 deg spray pattern? I searched for piston specs but i cant seem to find any measurements to compare them. Thanks for the helphttp://www.amazon.com/Piston-3908815-102-5mm-Cummins-diesel/dp/B00HJUWG2O