I'm building a 672 with Predator heads. I started to go 690, but opted for the 672 because of the rod/cam interference even with a 2 inch rod journal, and a 60mm cam.

Bryant just finished the crank, but still waiting on the block. The heads have been an ongoing effort, and still not done. Offsetting the rockers makes room to make the ports as big as they need to be, which seem to be a problem with big inch motors. With tool steel rockers we can offset, and move the port wall another .175.

When, if ever finished it'll go in my RJ stratus, and I think 1300 should be doable, but only time will tell.

Trouble is, there's no real reason to be doing it. There's no class where that head would be competitive against Ford, or Chevy. Just something to try.