They work well with good lifters like a Morel, however, the one mentioned is quite small for a 572 cube engine. The 270 head would be a much better choice for this combo as well.
I can go along w/ the 270 head .
That being said , a guy could probly find a hyd. cam kit that would work w/ them, I`d think >--------?? Probly aint gonna put out any more power than the 815 horse rat .
