Building a 383 for my challenger. I'm looking for a strong running street/strip engine that will run on 93 octane pump gas. It is bored .030 and will use stock rods and crank. It is going to use 906 heads that have been measured at 92cc. I'm considering custom pistons with a taller CH so that I can push the top of the piston into the open chamber to get .040" quench. The piston would be about .079 out of the hole. With this type of setup I calculate 10.5 CR using a flat top piston without valve reliefs. If I add in 5cc or so for reliefs I'll be in the 10.0 CR range. I've searched a lot within the forum and online for 383 builds using stock open chamber heads, but have not found any builds that took this approach to getting compression out of an essentially stock 383. Anyone have any experience to share on this approach?

Thanks,

John