FWIW, here's the built sheet on my 572 - no replacement for displacement. At 8.75:1 (assuming I'm not jetted too lean or have to much ignition advance) I should be able to run on dirt gas.

Yes, stepping up to a 572 requires a tall deck block...... But once you have that, you could go 600CID+ with notching the block on a 4.75" stroke.

I have not seen the dyno sheets, but was told 675hp @ 5400 rpms - not spun higher, as it has a hydraulic roller.

Attached is a link to the build sheet. The only thing different is that it's running a single Dominator - was trying to avoid hatch clearance issues by going with a low rise dual quad, but could not get to run well.


I would think you could get over 600hp with a similarly prepped 540. $.02

kook's build sheet