Rhoads lifters

Im 100% sure it was because of the lifters. Im not blaming the lifters, It was all my fault. We had a 11 to1 engine running a 230* cam that was running great, and for quite some time. After putting the rhoads in it was like dropping down to a 200*(or so) cam. The cylinder pressure was just to high and it detonated, bashing out the rod bearings which caused a few to spin resulting in the blowup. Live and learn.

And I can tell you, they don't always pump all the way up at the higher rpm. Dynos are a wonderful tool for testing such things.