It is a hemi pattern, as will the next. Next one is 5.125 stroke with a sbc rod journal and 4.53 bore. Was going larger bore till I decided to spray it. Have everything sitting on the bench, just no block yet....only been a year...waiting. Westcott is grinding a tool steel cam for it. 288/314 with a 535 lobe on a 116. Great for long life and spray, not so much na.