Mid 12's with a 318 head 360?

I picked up a set at Don's many years ago. In think 10 or 20 bucks. Bare castings. Never got to do anything, as they were stolen from me. Just like my .060 over 392 Hemi with 12.5:1 Jhans was... and I don't even want to bring up who burnt me on a set of 354 heads....