Anybody every play with or run a 576 head

pittsburghracer said

That’s what it sounded like to me. But with a better exhaust port. I may be going back over soon and may ask to take a better look at them out of curiosity. I guess he bought these before Edelbrock heads were released and paid around 2000.00 for them. They maxed out at 254cfm when he tested time as shipped.

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Mopar sold a variety of them in different configurations, bare and assemblies. One was either as-cast or slightly ported while another version was fully ported. There was also a casting for T/A or W-2 rockers. I would guess that the 245 flow are fully ported assemblies. No boxes, "P" numbers to go by?


From what I know, the 308 and 576 castings are basically the same, except the EGR holes. Same, big pushrod holes too. They've been called "swirl port" or having higher velocities, but don't know if that's accurate.

Exhaust port floors were raised & flowed better. Had one class racer tell me that they worked so well, they caused overscavenging of the intake flow in the chamber.