i have had many sets of 6.1, eagle and apache heads ported and flowed on the same machine. these are my typical results

ported 6.1s- 360-370 @6
ported eagles- 355-360@6
ported apaches- 380@6

and the thitek 2.20 valve heads on my 462 flowed 401@6

462 gen 3 hemi daily driven