After purchasing my Edelbrock E street cylinder heads, I had them checked out before trying to bolt them on. The plan with the heads is to make 500 horsepower on a 10/1 compression stock stroke 400 big block Mopar.

The heads had several issues that needed correction before installation.
Ed @edsmachine93 gave these heads a full performance treatment including:
Polishing exhaust ports, polishing chambers, unshroudinf the valves, back cutting the valves, adding a multi angle valve job, and shaving the heads .010. Lastly, he Checked the CC’s in each head for comparison and to help figure my final compression ratio.