is that a 400 or 440 block? pushing the limits of the factory block isn't it? could you go into details about how you keep the bottom end together on a build such as that?
Since when is 600 "pushing it" for a BBM? That's what most of our SBM are pushing these days and almost all are with factory blocks. We have so many 600-800HP BBM out there and as long as the tune is good, there should be no issues. Our truck puller 470 is done with its 3rd season, 2 seasons at 730+hp and 8000rpm pulls and this season at 795+hp and 8500rpm pulls. Its still good to go, but the tune is checked and adjusted every run to ensure no detonation. Im not worried one bit.