Cam selection

CamQuest likes the XR274R (236/[email protected];0.564/0.570) 552HP@6000, 524 ft-lbs@5000.

Or the XR280R (242/[email protected];0.570/0.576) 554HP@6500, 520 ft-lbs@5000.

You know about OU812's retrofit roller lifters? No block machining required, they say.

CamQuest shows your current setup as 484HP/468 ft-lbs.